Quote Qubes Disposables
Qubes does not have a built-in snapshot capability like VirtualBox that
can completely revert all changes back to a particular VM state.
True. Added a footnote:
Apart from [https://www.qubes-os.org/doc/dom0-tools/qvm-revert-template-changes/ qvm-revert-template-changes] which can only revert back prior the previous (not last) shutdown of the TemplateVM.
And another footnote:
https://forums.whonix.org/t/qubes-vm-snapshots-using-git-svn