@billgoats just casually dropping an intriguing bit of software they found on my lap just as I was about to sleep.
There's a VNC *server* for classic macs.
MiniVNC Remote Desktop Server for 68K Macs - Macintosh Repository
MiniVNC is a VNC server built from the ground up for very old Macs (e.g. Mac Plus from 1986). MiniVNC is now compatible with a wide variety of...
(www.macintoshrepository.org)