Moved your comment to an answer ... because now moderation includes this option :-)
I agree with everything and would have only made it a "me too" post.
Sunsetting services is unavoidable, and the only thing that is really irritating with obsolete services is not realizing that they are not maintained anymore and thus waste valuable time on them.
I would definitely turn to PubMedCommons now to see if there's any notice. I really liked that feature of the way that was being used.