This may or may not be true depending on what the VM is doing. One of my VMs, for instance, hosts a Mikrotik RouterOS installation. That one could easily run on just 256MB:
All my other VMs are running Debian Bookworm, which theoretically can also run on 256MB. In practice, my Caddy server VM, my Technitium DNS server VM, and my Asterisk PBX VM each run comfortably on 1GB. Add to this 4GB for a smooth Proxmox operation, and you have 4 VMs requiring less than 25% of the 32GB.
