I do have a bunch of the HPs for work related projects - they are pretty nice, and the x86 emulation works pretty good (and at least feels better than the x86 emulation in MacOS) - but a lot of other stuff is problematic, like pretty much no support in Microsofts deployment/imaging tools. So far I haven't managed to create answer files for unattended installation.

As for Linux - they do at least offer disabling secure boot, so you can boot other stuff. It'd have been nicer to be able to load custom keys, though. It is nice (yet still feeling a bit strange) to have an ARM system with UEFI. A lot of the bits required to make it working either have made it, or are on the way to upstream kernels, so I hope it'll be usable soon.

Currently for the most stable setup I need to run it from an external SSD as that specific kernel does not have support for the internal NVME devices, and booting that thing is a bit annoying as I couldn't get the grub on the SSD to play nice with UEFI, so I boot from a different grub, and then chainload the grub on SSD.