To your point, I’m running Proxmox on a 5+ year old Dell small form factor desktop with 3 (2.5") drives in it for data. That’s all that will phsycially fit.
Works great as a file server, and it syncs the data partition to a NAS and a couple external drives using an offset schedule. It also has a backup running to Backblaze. (The NAS doesn’t have the performance of the desktop, and it’s even older).
Ok dammit, I snorted.
Take your upvote.