R4.3 release notes mention this new feature:
Minimal state qubes to make NetVM and USBVM to consume as little RAM as possible
Is this documented anywhere? How do we manually configure this type of qube?
Look for minimal-netvm in qvm-service manpage
Edit: I made this PR to clarify the release note, see: Add link to qvm-service for "minimal state qubes" by parulin · Pull Request #1731 · QubesOS/qubes-doc · GitHub