Maybe it's time to rethink UWP and the mobile UI?
I get where Microsoft is coming from. The company I work for also basically lives and dies based on a couple of products that are standards for the industry we support. This is very similar to Windows/Office on the desktop. Microsoft badly wanted to control the entire platform the way Apple does, or at least control the OS the way Google does. Big companies take a long time to react, and it's only now that they're fully admitting their mobile platform is dead. Once a company gets addicted to lock-in, no product or initiative that doesn't result in 100% guaranteed total lock-in will ever get reasonable levels of funding. Look at Azure - Microsoft is poised to be the next IBM mainframe provider. Now THAT is lock-in on a grand scale...no more one-off software sales. We're moving one of those cash cow applications to Azure now, and it's astounding that people don't see that they'll be paying Microsoft *forever* to host it.
What I wish they would do now is admit that mobile is dead and continue rolling back the mobile-first user interface in Windows 10. No one wants VB6-era apps, but IMO they're moving too slowly in undoing what was done with Win8.