As far as my taste goes, this board would rank as the top spot for prog chit-chat, over the faux-cypherpunk style imageboards and naturally over the well-known and much more popular and frequented not-so-anon/ephemeral vote-each-others places with account names.
But why is this so niche?
You've answered your own question. It offers nothing that the others don't do better. I suggest you put "Status as a Service" in your favorite search engine. Its conclusions apply even to the most anonymous of sites.