You had use cases before in which you wanted more than 2 worktrees at once in the past and needed to juggle between them at the speed of "practical"?
What were you doing back then (a few years back and before agents as you implied) that required this and that your solution now solves?
What poor usability are you referring to here? Is the rate of utilizing git-worktrees a metric you are measuring? That does not make sense to me.
I also watched the demo video, and I don't understand the value here. Perhaps I am not your target demographic, but I am trying to understand who is. Is this for vibe-coding side projects only? Would be nice if you had a more practical/real stakes example. The demo video did not land for me.