Huh, you know what, maybe I'll give something like that a try. In the past I've tried doing one worktree per branch, but it was a pretty big hassle since I'd have to copy over a bunch of files every time (stuff sitting in the directory but not version-controlled). Yeah it can be automated, but it didn't seem worth it. But a persistent set of work trees that I can use to parallelize when needed sounds pretty good.