This definitely isnt the only reason one might choose to virtualize unraid on proxmox... But please browse through reddit, proxmox forums and other forums and you'll understand that it is the predominant reason that it pushes a user to use proxmox with unraid. Additionally, I mentioned both snapshots and backups are essential not just backups. Another thing, I'm really sorry, asking me to backup windows VM like any other windows machine is kind of corporate doublespeak for an essential feature that is not implemented. And windows VM is not the only VM an average user could be using. They could be using macos too and using proprietary tool for windows, macos and other VMs is a cumbersome process and definitely not an ideal way someone would backup a VM. The community backup plugins which are in beta for more than 2 years, too have issues and you can read about them in this very same forum. A lot of them wish to run unraid bare metal, I mean the ones who virtualize unraid. And that could be a possibility only if there is native backup and snapshot support.