I would say it's about the same. jj adds some concepts, like change/revisions and revsets, but it also has lower cognitive load than git on things like branches

I would say it's about the same. jj adds some concepts, like change/revisions and revsets, but it also has lower cognitive load than git on things like branches, the index, and the CLI. The ease of undoing anything alone makes it way easier to learn jj, since you can be fearless. It's not quite clear to me how much simpler DVCS concepts can be.