Semi-related: if I want to do a little side quest, maybe pop over to another repo or git worktree for a quick look, I'll drop into a subshell just by running bash before cd-ing. Then I just exit that shell (alias q=exit) when I want to return back to the original dir and context.
You know that you can just press <CTRL+D> at the bash prompt to quit it as well? (In fact <CTRL+D> will quit out of most command line programs as it's the End Of Transmission character)
