It hasn’t come up as a request that often as far as I know (this is the first I can recall), but people have been confused by the differences between the topic and reply share modals before… so more consistency wouldn’t hurt.
I do wonder how much use the notify feature gets… If I had to guess I’ve used it/been notified by it <5 times ever. Not sure if this indicates it needs to be more prevalent… or if it means it doesn’t need to exist.