[jrockway]

I've done the multiple trees thing too, and agree it didn't work very well.

jj solved the biggest problem for me, which is how much time you spend rebasing when you have 1 PR = 1 stack of commits on top of main. It's easy enough to work on multiple branches this way, but it's a lot of repeated pain when `main` diverges and your changes on top are still out for review. (I honestly just started squashing all of my commits before review, so I would only have to resolve conflicts once.) jj fixes all of this. I especially enjoy working on a 3rd pending change that refers to the previous 2 pending changes; `jj new june/feature-1 june/feature-2` and then you add feature 3 there. You can even `jj squash --into june/feature-1` if something makes more sense being in a prior commit. It's all very wonderful if you are working with other people and you can't immediately mutate `main` upon finishing some work.