I barely know anything about git but one thing I do know is worktrees are the only way I can use it. My mind just doesn't work in a "only one or two branches at a time" mode

I just learned about worktree (from a recent HN post IIRC) and thought it sounded really helpful for working on multiple simultaneous tasks in nixpkgs. Unfortunately I ran into some error trying to add a second worktree. Will have to take another look.

For longer lived, bigger projects, absolutely. For smaller stuff, not as much. I use it everyday for $work, but rarely/if at all for any small personal stuff.

I and others wrote a number of things on a thread a few weeks ago: https://news.ycombinator.com/item?id=39594164