I think it’s probably down to preference. I personally really like Fedora server because it comes pre-installed with the Cockpit webui which replaces the role of Portainer and makes other admin tasks like firewall openings and user management trivial. I’m definetly glad to have switched away from Ubuntu server which I was using before.
With how easy it is to Massgrave to get a valid Windows key, I personally don’t even consider backing up windows keys lol.