Congratulations! That's an achievement!
Though theoretically, I think I can eventually make it to 20,000 posts as well if three conditions are met.
1) the forum stays open
2) there are at least a few other members to talk with
3) I myself am alive and able to post
The first condition is crucial, depending especially on if people think GGG is the subforum that defines the needed activity to keep the forum in existence. We have created a cycle of posts there, me, Knight of Time, and Fett One. Right now, I have about 6,000 posts to go. Now if I post 3 posts a day, it takes 2,000 days i.e. 5.6 years! Of course I might run out of ideas in Twisted Wishes at one point, as well as far as other threads are concerned, but still, I wouldn't say it's impossible.