GPU passthrough is the Proxmox trick everyone wants to talk about first. It makes for better screenshots, better forum posts, and a much more exciting project than naming storage pools or cleaning up old backups. I get the appeal, because passing a GPU into a Windows VM feels like the moment your little server finally starts showing off. But after you’ve lived with Proxmox for more than a weekend, storage is the part that decides whether the whole setup feels dependable or exhausting.