I also reply from DW, but I often don't reread a lengthy comment closely, so I wouldn't necessarily spot edits. I would be fine if this was an option for others, but given the "more option are bad" stance of DW, if I could notifications for edits or no notifications, I would want the notifications. Also for minor edits, because sometimes a single word changes a lot, so there is no automated way to spot whether something was substantial or a typo edit.