I’m familiar with Proxmox, virtualbox, and KVM/KVM manager.

If I want to set up a PC to virtualize multiple operating systems, but with the feel of a multiboot system, what virtualization software would you suggest?

My goal is for the closest I can get to a multiboot system (windows, Debian, fedora) but virtualized so I can make snapshots. It should feel like I’m on baremetal when inside the VM.

Virtualbox is clunky with lots of pesky UI cluttering the screen and Proxmox doesn’t seem great for this use case.

With this method, would I be able to use an iPad as a display for windows 10? If so, are there any downsides? I remember trying Duet Display years ago but they charge a monthly fee which is absurd. And performance was not great.

Good idea. I was leaning heavily towards those raspberry pi monitors.