Nix is so cool… have you tried microVMs?

They can be compared to Docker containers, except they’re safer and easier to manage.

This is not to mention that all those config files totally are reusable. Once you configure a Bitcoin node with NixOS, you can reproduce that on another computer just by reusing code. Reminds me a lot of programming language libraries.

Oh, and setting up baremetal computers is done with the same exact concept. That means any config can be reused anywhere, in a virtualized environment or not.