You're not the only one to mention memcached. Please go read the article, that's part of what I'm complaining about. They had memcached, and so many other thing

You're not the only one to mention memcached. Please go read the article, that's part of what I'm complaining about. They had memcached, and so many other things, including a very advanced commenting system, and yet they lost the opportunity to scale and go mainstream, and remained a niche site which consists largely of support groups and fanfiction. (Again, nothing wrong with that, but it could have been so much more.)