This doesn't really match my experience, but all I have to counter your anecdotal evidence is my own anecdotal evidence.

In my opinion, concluding that Copilot is "winning" right now is like concluding that Internet Explorer was winning while Chrome was still young. It may be technically true, but it's easy to see the writing on the wall -- that it's only winning because it is the default option available at most companies.

I have never met a satisfied Copilot user, and as a consultant I met a lot of Copilot users. It's hard to believe how totally and completely Microsoft is shitting the bed. As you point out, they have the enterprise integrations. Why can't the build a good product with them? Generational blunder, in my opinion.