I am using Tumbleweed with the tumbleweed-cli and I am upgrading every few weeks after looking at the current stability review. Now, it happened that 20200908 caused Qt Creator to hang here (could not yet investigate), so I decided to `tumbleweed revert --install` which should have taken me back to 20200807 but, alas, that version is already pruned. OK, I now went back to 20200816 which is the oldest snapshot on the archive and I am keeping my fingers crossed that will get me back to operational state but I was wondering whether there is a way I could keep the packages of my last installed and known to work snapshot around locally, so I can _always_ go back to that after switching to a new version? Having one stable version as a backup would really feel good.