You know, I was starting to wonder if I should maintain this list or not, but then I noticed today that the Dev Tracker has 1 page. Everything else has been deleted.
The dev tracker returns an arbitrary number of pages every time, probably as many as it finds within a specific time frame. If you manually page it forward (i.e., append "?page=x" to the URL), it works. For example, ?page=42 currently takes you back to dev posts from April.
Obviously I can't authoritatively say whether any dev posts have been deleted, but I can say that a significant majority are definitely still there. It's just that the dev post auto-searcher is decidedly odd.