The Mega65 https://mega65.org is a remake of the Commodore 65 that can run Commodore 64 software in go64 mode. If Commodore released it they might not have gone bankrupt.

Recently I discovered the joy of running Mac OS9 on Qemu on a Windows 10 machine. Reinstalled my old copy of Photoshop 5.0 and a bunch of filters I had back in the 90's. So much fun!