Yeah the Proxmox limitation originally came about because I didn't find a reliable way to detect enterprise use from the CLI (But I had not used Proxmox before implementing that, so I might have missed it).

But if I see this correctly, I could call the API from the command-line with this: https://pve.proxmox.com/wiki/Proxmox_VE_API#Using_'pvesh'_to... and check the response. If that is possible I can definitely change that limitation.