because sometimes i need a vm (home assisstant has more features thsn home assisstant container), sometimes a container (i mostly use lxc).
its not really an extra lauer because proxmox is an os.you use nixos i use proxmox. everything is out of the box. proxmox has comminntiu scripts to run everything and set them up. there is an i stall script for about everything community-scripts.org
sure podman has similar setup but i also need vms and they are all mamaged in one place
EDIT: you can read the script, its text