Right, exactly. That's super-annoying to do if you were keepingeverything mixed together in the master branch, much easier if you were
keeping separate branches for each fix but keeping those separate branches
is itself incredibly annoying, and utterly trivial if you're using gbp pq
or git-dpm. The latter take a little bit of getting used to, and are then
almost as fast as just making changes directly in Git, but let you
actually send isolated fixes upstream.
I would never use quilt directly. Been there, done that, have no interest
in doing it again. I like Git. But using it as an export format for
patch-queue branches works really well.