Do you run anything in a VM just for fun?

Haiku!

https://www.haiku-os.org/legacy-docs/writing-video-card-driv...

In VMware workstation I have Haiku nightly and beta

Does PCem or 86box count as a VM? I got a full Windows 98. Ecomstation. Various DOS. ArcaOS. Os2 warp 4.

I got mini vmac with system 6.0.8.

I got sheepshaver with Mac OS 9.0.4.

I got basilisk II with system software 7.5.3 rev 2.

I got GSPlus with system 6.0.4.

I got Amiga Forever / WinUAE with just tons of versions of AmigaOS

I love having tons of computers as accurate as possible ready at a moments notice

Well... there is that one thing: https://postimg.cc/V5qSJdBb

8-bit CP/M in a home-grown Z80 emulator.