MS (like all corporations) only cares about one thing, making money. It's not silly to distrust a corporation that has repeatedly in the past stolen, subverted, and act in bad faith as soon as a 'threat' to their complete dominance has shown up.

Yes, most of the old-guard are gone. (Gates, Ballmer, etc) But I'm not entirely ready to trust them yet. (Windows10 telemetry, not honouring user-defined configuration [Peer-to-Peer updates active even though it's disabled in user-facing options], Candy Crush and all other game 'apps' being pulled from the MS store.)

So they aren't even acting wholly trustworthy now, even under this current management. Why would I trust them to be nice with Linux?