Daily Apple IIGS user here, with one 65816 project on github. :) There are still a few of us. For what it's worth, mine is stable at 12MHz (hot-rodded Transwarp GS), and is completely solid-state: CompactFlash and LCD only, no floppies or CRT monitors. I may not have used it to write this post, but I'm still busy trying to beat all the games.