I currently have 32 VM's...
And this is just in VMware Workstation Pro!
I have at least one in Virtualbox, and I think 2 or 3 in KVM.
Gotta have a MacOS, Windows 10, and Windows 11 of course.
A couple Androids, a Plan9, SmartOS(UNIX), Haiku, and ReactOS.
I'm missing a proper BSD and an Inferno for the essential operating systems collection.
But the overwhelming majority are Linux distros.
Some of them are build environments for specific things, and a couple are servers that I actually use or even copies of real servers I decommissioned.
The majority of them are for projects that I planned to do or projects that I've already done, but I find it hard to delete them because I feel like I'll need them at some time in the future lol.
And then there's all of the .iso images themselves...
I think I might be a VM Hoarder.
This is why I miss having a dedicated ESXi server. The entire machine was just VMware VM's with their own CPU/GPU/RAM and most importantly hard-drive...