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Fiber Laid in the Dot-Com Era Still Works. Eric Hippeau Says AI Chips Won’t Last Nearly That Long.

Ink illustration: a row of old cast-iron street lamps recedes down a cobblestone street. At the base of the nearest post sits a crate of new light bulbs, one of them orange, beside a small pile of burned-out bulbs.

Fiber Laid in the Dot-Com Era Still Works. Eric Hippeau Says AI Chips Won’t Last Nearly That Long.

Quick Read

  • Dot-com fiber is still carrying internet traffic decades later, but AI chips won't get anywhere close. The reason behind that difference changes the math for every company buying them.
  • AI usage costs are collapsing, and that turns out to be quietly bad news for the companies that paid the most to deliver it.
  • The dot-com boom ran out of money, and today's AI buildout could hit a wall the 1990s never imagined. Notably, it has nothing to do with demand.
  • Building a portfolio and living off one are two completely different skills, and almost nobody teaches the second. This problem is what The Definitive Guide to Retirement Income helps, and it is free today. Read more here. (Sponsor)

Where we heard itCNBC’s Squawk on the Street, Oct. 16, 2026. Speaker: Eric Hippeau, managing partner at Lerer Hippeau. Watch the full interview

Fiber optic cable laid during the dot-com expansion is still in use today. The chips that power artificial intelligence will not last nearly that long. Eric Hippeau estimated that AI chips have a useful life of roughly five to seven years, speaking on CNBC’s Squawk on the Street on October 16, 2026. CNBC introduced him as managing partner at the venture firm Lerer Hippeau. His overall view is that the AI boom shares real features with the dot-com era, with one difference that changes the economics.

Quote: “They’re going to have to be replaced by better, hopefully cheaper, faster chips.” Eric Hippeau, managing partner, Lerer Hippeau, on CNBC’s Squawk on the Street
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Spending Is Running Ahead of Revenue, Just Like 1999

In Hippeau’s telling, the money going into AI infrastructure is running well ahead of the revenue needed to justify it. He also sees financing becoming more leveraged and more creative, which mirrors the late-1990s telecom expansion, when carriers borrowed heavily to lay networks before demand showed up.

Lenders are feeling it too. Axios reported Friday that banks are pulling back as AI’s massive debt pile disconnects from economic reality. SpaceX is seeking $40 billion in financing to buy Nvidia chips, and its credit default swaps hit a record high after the plan became known.

Bar chart: AI revenue is on track to cover less than half the bill. Gartner estimates AI providers will spend about $7 trillion on AI infrastructure from 2026 through 2030, would need $8.5 trillion in revenue to cover that spending, financing costs and a 12% return, and will see no more than $3.6 trillion in AI revenue tied to AI data centers.
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AI Chips Run on a Much Faster Replacement Clock

Hippeau said today’s AI chips “are going to have to be replaced by better, hopefully cheaper, faster chips.” Dot-com fiber, by contrast, is still carrying traffic. Once it was paid for, it kept earning a return.

That contrast works in two directions for investors. For chip suppliers, a replacement cycle means repeat business: every accelerator installed today is a likely future order. For the large cloud companies and other buyers, the same cycle means spending that keeps coming back. Buyers spread a chip’s cost over its expected life through depreciation, an annual expense that reduces reported profit.

A shorter useful life makes that yearly charge bigger. This is our reading of his point. He did not spell out these accounting effects.

Falling Token Prices Make AI Cheap to Use

A token is a small chunk of text, often part of a word, that AI models process and that providers use to price usage. Hippeau said the price of AI usage measured in tokens is falling dramatically. He credited that mostly to open-weight models, which are models whose underlying parameters are released publicly so anyone can run them, and he said there are now dozens of them. In his characterization, you can now run AI for almost nothing. Cheaper usage helps adoption. It also makes it harder for buyers who paid top dollar for compute to charge premium prices for it.

Power, Water and Neighbors: Limits the 1990s Never Faced

Hippeau framed the scale this way: “We’re talking about spending in one year what it took ten years to build the internet infrastructure.” He added that the dot-com expansion never ran into today’s water and power constraints, or into opposition from local residents and municipalities.

Government research points the same way. A Government Accountability Office report notes that the Department of Energy projects data centers will account for up to 12% of U.S. electrical demand by 2028. A Colorado legislative review found that data center load growth is the primary reason for recent capacity market conditions in the PJM grid region, and it lists a growing number of state bills on large-load tariffs and permitting.

Two life spans and a power bill

AI chip life5 to 7 yrsHippeau’s estimate before chips need replacing
Dot-com fiber25 to 30 yrsAge of fiber still in use, Hippeau said
Data centers’ power share4.4%Of U.S. electricity in 2023, per a DOE-funded study
Share by 2028Up to 12%DOE projection range: 6.7% to 12%

Agents Could Take Over the Jobs Apps Do Now

Hippeau also described where he expects AI to end up: “You’re not going to have to go to websites, you’re not going to have to go to apps. You’re just going to be asking your agents to do your bidding, your ordering.” An agent is software that carries out tasks for you, such as booking, buying or scheduling, without you clicking through each step.

His comments came during a rough week for chip stocks. The iShares Semiconductor ETFSOXX fell 11.8% in the week ended Friday, Oct. 16. The fund had returned 81.2% this year through Oct. 12, when a JPMorgan strategist called chip stocks cheap. Hippeau did not comment on this week’s moves. The selloff does show why the question of how long these chips last matters right now.

What to Watch as AI Spending Grows

The most useful signal will be in the accounting. If buyers of AI chips start reporting shorter useful lives for their servers, it will confirm Hippeau’s timeline, raise depreciation costs and test whether AI revenue can keep up.

Bar chart: Among five big AI spenders, only Amazon has cut its server life. Years each company depreciates servers and network gear over, per its latest filing: Alphabet 6 years, Oracle 6 years, Microsoft up to 6 years (a range of 2 to 6), Meta 5.5 years (raised in 2025), Amazon 5 to 6 years (some servers cut from 6 to 5 in 2025).
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The second signal is physical. If power shortages, water limits and local permitting fights start delaying new data center projects, the spending curve will level off no matter how much financing is available. Both will show up in company filings and local zoning decisions well before they show up in quarterly guidance.

The bottom line

Hippeau sees the AI buildout repeating parts of the dot-com boom: spending ahead of revenue, more creative financing and falling prices for what is being sold. The difference he stresses is that AI chips last about five to seven years, so buyers keep paying for new ones. The risk is that revenue, power and local approvals can’t keep pace with that cycle.

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