I know I can google this, but I am really looking for a more personal answer that others might also gleam insight from.

What are the efforts like for non x86 architectures, if any exist?

Are there working kernels for arm as there is for *nix with things like Raspberry Pi?

I haven't started my IoT journey yet. I am wondering if plan9 would be stable enough to tinker with in that space and in order to capture two birds with one trap.

[edits made to cleaned up the original mess]