It's a really interesting one, it's done much better than most people expected and seems to have a very strong community. It could evolve into something really interesting in the long-term, like it's entirely possible that twenty years from now it'll still be going strong with a healthy user base, it might even have the scope to really embed itself and still be popular in fifty years.

I never expected it to get to where it is and I never expected it to get to any of it's previous milestones, now I'm starting to really wonder how far it could go