I'd like to see Proxmox do a better job of supporting USB devices. If a USB port could easily be assigned to a VM so that the VM sees it just like it's own physical USB that would be best. A person could then plug and unplug devices into that USB port all day long and only that one VM would see the device, and the user wouldn't need a degree in computer science to us something that was designed to be plug-n-play. That would also allow for USB supported UPSs machines to shut down Windows Servers rather than have them just crash when the power runs out.