I absolutely do not trust Microsoft with file storage. For whatever reason their entire internal platform is behoven to Sharepoint and that is a no-go for me.
M365 to Azure is a bit more of a jump maybe, but there's AAD which I think is a bit of an on-ramp? Then I gather Excel is getting better at integrating with the data products on Azure? I think there's something there, enough to make Azure the path of least resistance for some orgs.
Sentence should have stopped there.
And now you have Teams running on top of it as well. And it's also a total piece of shit. God damnit, I'm so much happier not having to admin any more Microsoft shit.