Just an example. Microsoft developed several browser engines: first Trident, then EdgeHTML. Edge wasn't bad, it was on par with Chrome, may be slightly behind, but nothing that couldn't be fixed with time. But Microsoft decided to abandon it and use Blink, because that was cheaper.

I absolutely could see the same scenario in the future, when they would need to cut expenses. Just get Linux, wine, fix enough bugs to make explorer.exe and OneDrive.exe to run smoothly enough and ship it.