Here's something that happens to me. I start working on a medium-sized change. It's not worth a branch. However, I do want to run the old and new versions in parallel.
Now, I have two annoying choices. (a) I can temporarily edit the versions of all of my modules to stop collisions. (b) I can make a separate local repository, and get an entire additional copy of all the maven plugins just so that I can keep two sets of my artifacts separate. Oh how I wish that the plugin local repository could be separated from the dependencies, or, better yet, three buckets: plugins, dependencies, and things I'm actually building right now.
