Per task mail notifications

i just started a new task for a side side project that I did not want to extensively check-up on and then I realized what is missing for tasks. Can we get a checkbox, that if you tick it, it will email the user when the task is done (or maybe also if failed or so)? The feature is already included as one can turn on task status updates emails in settings, but I think a “per task” checkbox might be more inviting. Just a thought.