This isn't that easy, you'd need support from SOC manufacturers, board manufacturers, also I believe ARM chips don't have feature enumeration as x86 chips do. N

This isn't that easy, you'd need support from SOC manufacturers, board manufacturers, also I believe ARM chips don't have feature enumeration as x86 chips do. Not to mention that your kernel would need to embed a whole lot of binary blobs since many things like modems are not open at all. I'd like that as well of course but vendors don't seem very interested in cooperating with each other right now.