Microsoft missed the arrival of the web. Microsoft also missed the mobile revolution and ended up with zero mobile operating system market share.
Internet Explorer, having vanquished Netscape, declared "job done" and stopped developing the web browser further, only to be cast to irrelevance for its failure to advance and innovate. Much like Google search.
Kodak, Yahoo, Commodore, MySpace etc etc etc all missed the critical technology change that left their business behind.
Despite seeing the oncoming train, Google may be too arrogant, too internally political, too controlled by it's vast river of web advertising gold, to be willing or able to make the changes needed.
And it may be that Google simply cannot transition it's search over to becoming top dog in AI information seeking - it's possible that AI interfaces aren't a "winner take all" market like search is. If that turns out to be true then Google won't be finished but it will be diminished.
ChatGPT brings a laser focus that Google simply cannot.
It's possible Google's time has passed.
I remember distinctly when Google arrived how instantly old and out of date Altavista suddenly looked - that's how Google search looks now.