I got plan9 working on my Raspberry Pi 3B+, including wifi. I used Miller's 9pi.img. Can read webpages with webfs and abaco. Last night I got drawterm working using the instructions on SDF.
SDF Public Access UNIX System - Free Shell Account and Shell Access

abaco gets the Troglodita Seal of Approval.
This drawterm is *really cool*. It automatically mounts my laptop filesystem onto the plan9 cpu (to /mnt/term), so I can copy files back and forth. It's included in debian and ubuntu, so it's simple to set up.
@humberto If you like that, you may like sshfs.
@indirection I do, but it's not included in the 9pi.img

@humberto sshfs is a *nix tool 🙂 I mentioned it for when you're not using Plan 9.

You may want to check out 9front as well. It's much more developed.

@indirection there's a sshfs in 9front, but no wireless driver for the raspberry pi.