Earlier quoted context omitted.
> VSS I just had trauma! I will say that SourceSafe had one advantage: You could create "composite" proxy workspaces. You could add one or two files from one workspace, and a few from another, etc. The resulting "avatar" workspace would act like they were all in the same workspace. It was cool. However, absolutely everything else sucked. I don't miss it.
So it’s a workspace that includes changes from multiple branches at once, like `jj new revset-1 revset-2 revset-3 …` ? (Git has octopus merges, jj just calls them “merge commits” even though they may have more than two parents)
We moved from VSS to SVN, and it took a little encouraging for the person who had set up our branching workflow using that VSS feature to be happy losing it if that freed us from VSS.