[recursivecaveat]

It says that merges that involve overlap get flagged to the user. I don't think that's much more than a defaults difference to git really. You could have a version of git that just warns on conflict and blindly concats the sides.

[shaftway]

This is kind of how jj handles the situation. git won't let you move on from a rebase if there are conflicts. By comparison, jj will just put a marker in the log pointing out that there are conflicts in a branch. You resolve them whenever you feel like it, but all resolving them does is effectively remove the "conflict" marker and rebase all of the descendent commits (which may clean up merge conflicts, or make them worse).