"Google is still the biggest provider of high quality AI research papers in the world."
I agree that they have at least one of the top AI research groups among the corporate players. But is that going to translate into business advantage?
IBM Research was (and is still to some extent) pretty solid, but did that actually translate into business advantage? The "Watson" that competed on Jeopardy was impressive for its time. But we can look back on how the attempt to commercialize that flopped pretty hard.
Note: I'm not saying Google has IBM levels of sclerosis, at least not yet.
But there's no ironclad law that a solid research division will always turn into something profitable.