[geff82]

NetBSD is a great system for learning Unix. It lets you deep dive into certain topics because you have to. I learned to use Unix with NetBSD in the 2000. Only problem: find hardware for it. If you do not have a Raspberry Pi, your PC should not be brand new ideally (3-4 years is a good starting point).

[fishtacos]

VMs don't work as well?

[Y_Y]

VMS will probably work better on your VAX, but it's not as up-to-date.

[ianai]

This release lists lots of increased hardware support including vms.