I have an HP 4u from 2010 with 80 threads and I think a quarter TB of memory, 6 SAS, and 2 1TB ssd, currently running Ubuntu 16 and Wok, for VMs. It took a lot of effort to get this working and it's still a huge pain - I have no UPS for it since it uses 220VAC, and UPS cost more than the server cost me, for example.

I can't use docker in general because my internet is too crappy. That was annoying in 2012 when I first used it, but it's even worse now. I've always worked with VMs, since 2001 or earlier - virtualbox, wok, AWS, wok, and now proxmox.

It helps to know what your use case is, I don't run a ton of VMs, just one or two at a time that can use almost all of the resources of the server, and I generally do infrastructure and computing work in general.

I presume none of this counts as a homelab, though, since I don't program in rust.