You mean Microsoft proactively kept shooting devs in the kneecaps?

Leaving phones behind on old incompatible OS versions 2 times in 3 years and switching app frameworks 3 times in 4 years does not a good app developer experience make.

Piled on top of that, Google became actively hostile to 3rd party developers building support for YouTube (and Gmail and Gmaps, but those had workarounds / alternatives).