Well that entirely depends on what you’re running now of course. Due to lack of information I assumed the most common setup of community vSphere or Proxmox on old PCs / SFF workstations. If you’re already doing used rack servers, USPs, redundant switches and SAN then it’s not really any more proper just more modern. I put fault tolerance as something that takes you from less to more proper. If you’re hosting important stuff like say security systems, mail, communication like Matrix and the family photos then it stands to reason that it should be run on infrastructure that will last, make upgrades easy and keep your data safe (which also of course requires some kind of off-site capability as well). That said I don’t have the space for a server rack at the moment so I can’t realize my plans in this area, but one day I will!