I have been running proxmox at home for a few months now. It has been, to say the least, an adventure. And I have nothing but good things to say about Proxmox at this point. Its running not only my home related items (MQTT, Homeassitant), it also plays host to some of the projects I'm working on (postgres, go apps, etc...) rather than runing some sort of local dev. If you need to exit vmware, proxmox seems like a goo…
I appreciate projects like Proxmox but it must be also said that you can achieve same functionality sans the UI with tools available on most Linux distributions: libvirt, lx{c,d}, podman etc.
And Proxmox is just skin on lxc and quemu/kvm.
I will say that as I have just started playing with the lxc api, having the Proxmox UI as a quick and easy visual cross check has been lovely.
Podman is an amazing alternative to docker, cant say enough good things about it.