One super-useful key combo which is often overlooked is C-x-e, which edits the current command in $EDITOR. Very useful when dealing with history and long commands that need parameter editing.
I wonder if atuin could parse tags if given at the end of a command, after a # ?
sudo somecommand arg1 arg2 # admin
mpv arg1 # media
I have work-related stuff that I'd love to be able to tag and then filter history based on that. Hmm now that I think of it, maybe it will just work like that anyway.