Proxmox vs Qemu
I’ve got Proxmox on the servers and Virt-Manager (Qemu) on the workstation.
I tried out VMWare many moons ago, upgraded to VirtualBox, then settled on Proxmox & Qemu.
Of course Proxmox is a given, for the ZFS pool.
On the workstation it’s really unimportant, it’s just a sandbox for Microsoft Windows to be trapped in. It’s strictly for legacy stuff, I don’t even really have a use case for it.
(If I was running a cloud server I’d probably just use Proxmox, depending on the specific technologies needed, of course.)