This.
Plus: it is impossible to create a new Google today, regardless of the technology.
Google was the product of a monopoly over technical knowledge. That monopoly came crashing down with the extension of college education. It won't come back.
Why things will eventually fall apart:
1. Everybody, even Google, seems to be treating AI as if it were some kind of winner take all competition like web search was, in which Google taking over 95%
2. But everybody is building essentially the same technical solution with essentially the same data, so there is no moat.
3. If there is no moat, nobody is going to take 90% of the market.
4. With no clear winners, nobody can charge monopoly prices; instead, you get price wars and commodity pricing.
5. Which means everybody will wind up overpaying compared to the modest profits they will be able to make in an intensely competitive regime.
Am I missing something?