I often have the need to futher refine a highlight, e.g. by making it shorter or highlighting most the important part with a marker pen formatting. Is this something you'd be considering?

I figure the current immutability has its good reasons (it could be annoying if a public cards was changed completely in it meaning), but maybe theres something in between (e.g. allow edits but show a revision history, or always show other users the version they saved first.. ooof I can see the feature creep)

(Example screenshot from Heptabase).