I think you underestimate the effects of bureaucracy and sclerosis at large companies like Google, and the upcoming crackdown like the EU's DMA and DSA. Just look at how OpenAI basically stole Google's lunch.
Too early to spike the football over that, OpenAI got outfoxed on Dall-E illustratively and ChatGPT's best chance for monetization remains as a feature for MSFT services, not an independent entity.
Altavista wasn't a startup, it was a spinoff from DEC, a company that had its own issues with sales at the time, which led to their ignominious takeover by HP.