I'm beginning to think that what we want is for gbp and git-dpm tointeroperate, such that any individual maintainer can use whichever tool they
choose, but would still allow the team to adhere to consensus recommendations,
so there's no guesswork involved. E.g. the ultimate artifacts would end up
being the same, regardless of whether you used gbp, git-dpm, or plain vanilla
git + quilt. One example of a superficial differences is the tag names used
by default. They're different between the two helpers, but really needn't be.