Google doesn’t really have much of a track record in real breakthroughs, does it?
It was built on its founders’ initial application of an eigenvector centrality algorithm to web search. The main innovation there was the application, not the algorithm - it was innovation more than invention.
Since then, perhaps the most technically impressive thing I’m aware of that Google has actually productized is their language translation system. But again, that was primarily innovation that built on existing technology and access to a lot of data, hardware, and distribution capability.
> Just a few years ago it was the place to be and our PhD students were dying to work there.
Wasn’t that mainly because of money and the collection of smart people you mention, bought by that money? Which is not the same thing as a record of achievement.
I admit I could be wrong, I’m open to being corrected.