Java ending up with Oracle was a bit of a worst case scenario as well, yet people still write Java. Exclude languages originating with a big corporate sponsor or owner, and that's half the development ecosystem gone.
Before I jumped ship to the Apple ecosystem around 10 years ago, I was even then already sick of Microsoft abandoning or being indecisive about their platforms.
I would be too worried about Apple going full Apple and screwing devs to ever learn Swift.
I think this is a permanent disadvantage for anything B2B.