Half of these exist because I was bored once.
The Windows 10 and MacOS ones are GPU passthrough enabled and what I occasionally use if I have to use a Windows or Mac application. Windows 7 is also GPU enabled, but is more a nostalgia thing than anything.
I think my PopOS VM was originally installed for fun, but I used it along with my Arch Linux, Debian 12 and Testing (I run Testing on host, but I wanted a fresh environment and was too lazy to spin up a Docker or chroot), Ubuntu 23.10 and Fedora to test various software builds and bugs, as I don't like touching normal Ubuntu unless I must.
The Windows Server 2022 one is one I recently spun up to mess with Windows Docker Containers (I have to port an app to Windows, and was looking at that for CI). That all become moot when I found out Github's CI doesn't support Windows Docker containers despite supporting Windows runners (The organization I'm doing it for uses Github, so I have to use it).
GPU passthrough has always been one of those exciting ideas I’d love to dive into one day. My current GPU being a little older, has only 4GB of RAM. Oh the joy's of being a budget PC user. Thankfully it's more of a "would be nice rather" than an "actually need"....
I did this with Qubes a year ago and haven't had any issues apart from figuring out the right flags to get the full performance, otherwise the GPU would cap around 30% under load with low CPU load.
Kind of at the mercy of what your motherboard and bios will allow, mine I had to cheese a little and disable the PCI device on boot so I get to decrypt my disk with no screen lol but it works!
My motherboard is a stock dell from around 2012 so I doubt performance would be at all good. Thats even if it worked in the first place....