Can't help w/ the above, as I'm having fun with OS/2 Warp (Arca Noae version, *current* reseller of OS/2!) in a VM.
Gets me my object-oriented desktop fix, and surprisingly, I'm able to do pretty much all my productivity work in it. This should make it as one of my "core" productivity vm's ...
Folks are working on kernel (loader) replacements (QSINIT, OS4 projects) for the original, so maybe we'll see 64 bits! ! In the meantime, lots of ports to it from the linux world, including GCC, package managers (rpm/yum, anpm), etc. I'm able to run firefox and such, so not cut off from the rest of the world (although it may have been better to be cut off?)
I think my perfect PC would be a type-1 hypervisor (esxi, gobs of ram & ssd's), and a boatload of vm's holding core productivity machines (win, linux today, soon to include OS/2, and who knows what tomorrow), and all the other os's in vm's that there just isn't enough time in the day to play with. Last time I looked, about the only thing holding me up was nvidia graphics support, shared out to all the vm's ...
Hyper-V gets close, and I might switch a physical machine to it one day, but I feel like MS "pollutes" these solutions (Hyper-V, WSL, etc.) with so much extraneous crap that I tend to stick with standard virtualization (vmware workstation, virtualbox).
Attached is the ArcaOS desktop in OS/2 ...