Well, that's pretty much what "not supported" means in this context.Apple (according to the Asahi folks) hasn't really thrown in deliberate roadblocks. They just aren't helping the project either.
"Supported" would imply things like publishing all the necessary documentation for writing bootloaders and drivers and committing to not suddenly making breaking changes. Asahi are using a mechanism intended by Apple to allow developers to boot older, unsigned versions of MacOS.
Don't forget that while running full Win11 on the Pi is unofficial, unsupported and flakey, Microsoft does/did officially support "Windows 10 IoT Core" on the Raspberry Pi - and while that's a long way from being "full" Windows with a GUI it explains why the fundamentals of booting a Windows kernel, identifying devices and drivers for basic I/O and storage are already there.I'm not sure about Raspberry Pi; Broadcom's might be similar or the same as Qualcomm.
Yes, but Asahi Linux is a crowdfunded "free software" project that runs on enthusiasm and "enlightened self interest". They've made really impressive progress but are still a long way from a stable production version & really have to keep their fingers crossed that Apple won't - intentionally or unintentionally - break what they're doing with future hardware/firmware. Microsoft would want a rather better business case - probably with some longer term support guarantees from Apple - to do something that is not necessarily in their interest.It depends on the extent. Basic stuff should be possible for Microsoft to do; Asahi Linux has done it.
Trouble is, Apple are currently way ahead of the game when it comes to making personal-computer-class ARM SoCs. If Microsoft released a full-blown, native, WoA for Apple Silicon in the near future then they'd pretty much be handing Apple 100% of the Windows-on-ARM market overnight. That's not going to please Dell, HP, Lenovo etc. who are currently key to Microsoft's original business model of software licensing to OEMs - and who won't be able to make their own Apple Silicon systems unless Apple U-turns on licensing. I doubt MS would risk it - if they want to push WoA then the route would be to pursue "Microsoft Silicon" as something that could be licensed to OEMs (which is kinda what they're already doing with Qualcomm) and they really don't want to set up Apple Silicon as the target to beat...