The main reason I dislike Jetpack Comments it that the "Notify me of follow-up comments via email" feature doesn't allow for the choice of to be notified of replies to ONLY your comment. I hate that if you check the box you get flooded with notifications for every single comment left after yours which is a shame as I really like to know when my comment is replied to.. I like Disqus but dislike that there's no url field for guest commenters & no tie in to Gravatars if the commenter is a guest or if they haven't set an avatar or selected to use their gravatar in their profile for registered users. I really like & use Intense Debate as it ties in to gravatar & allows guest commenters to leave their url so I can check out their sites.. Does it really matter that much if ID is no longer under development?