[yencabulator]

My read on jj so far has always been "convenience wrapper over a preexisting Git concept" and simultaneously "alternate CLI that might be easier to learn".

Much like BitKeeper was sort of like an automated set of conventions on top of SCCS, (and Git and BitKeeper are near-interchangeable if you don't look at any of the details,) jj is like an automated set of conventions on top of Git.

(I personally wish the jj project had leaned harder into "it's just Git operations, made easier" instead of the whole "abstraction over storage layers" spiel, which needlessly scares a person familiar with Git, and makes the project sound very wishy-washy. When you peek under the hood, it's just Git! If it wasn't, I probably wouldn't use it!)