jj’s whole deal is that it collapses many Git concepts (stashes, staging, fixups, in-progress rebases, conflicts) into a single unified model of working with history, which then lets you use the same tools to do all of those things. For example, to fix up an old commit you jump to it, edit it, and jump back to where you were; to fix a rebase conflict you jump to the conflicting commit, edit it, and jump back to where you were, using the same commands.
– Understanding Jujutsu bookmarks
This is such a good summary, I’m probably going to steal it when I try to explain jj in the future.