I like keeping old branches but a lot of places ditch them, never understood why. I also dislike git squash, it means you have to make a brand new branch for your next PR, waste of time when I should be able to pull down master / dev / main / whatever and merge it into my working branch. I guess this is another reason I prefer the forking approach of github, let devs have their own sandbox and their own branches, and let them get their work done, they will PR when its ready.