@quad For me, Proxmox is basically LXC and KVM with a nice web UI on top. I use the web UI rarely, but you can do anything KVM and LXC can do, with zero issues. I even automated some stuff via Ansible and it's a bliss. I don't see what benefit would it have to give up on the web UI, despite using it rarely. I mean, it's not like the web UI is a resource hog anyway.
What I miss, honestly, is nftables support, as Proxmox is still on iptables. But it's not that critical, I can wait.