The main reason so many Android devices are throwaway junk is Qualcomm. Don't rely on them for anything that you still want to keep running for more than a couple of years.
Would like to see perf numbers. Could be an interesting box, maybe a nice home server.
I can understand from the lockdown perspective (i.e. just give me a Vulkan driver on macOS) but as a polished DTE with a unix terminal I find it pretty decent.
Package manager that controls the entire system, not just add ons.
Choice of desktop environments, no silly $3 apps to enable simple things like edge snapping. Options for tile based window manager, etc.
Decent cut/paste (no control-v and control-c instead of sweep and click to paste).
SystemTap for performance analysis.
Seamless use of containers with the same environment as the host OS.
Ability to create binaries that don't require the approval of some Apple run web service to run.
Linux package manager (not brew)
Linux kernel with cgroups