In 2012, Google was far ahead of the world in making the vast majority of their offerings intensely API-first, intensely API accessible.
It all changed in such a tectonic shift. The Google Plus/Google+ era was this weird new reality where everything Google did had to feed into this social network. But there was nearly no API available to anyone else (short of some very simple posting APIs), where Google flipped a bit, where the whole company stopped caring about the rest of the world and APIs and grew intensely focused on internal use, on themselves, looked only within.
I don't know enough about the LLM situation to comment, but Google squandering such a huge lead, so clearly stopping caring about the world & intertwingularity, becoming so intensely internally focused was such a clear clear clear fall. There's the Google Graveyard of products, but the loss in my mind is more clearly that Google gave up on APIs long ago, and has never performed any clear acts of repentance for such a grevious mis-step against the open world, open possibilities, against closed & internal focus.