Hmm... over at a popular wetshaving forum (Badger and Blade), we have threads that have run for years with upwards of 10,000+ posts. Heck. There's a thread called Sheng of the Day for members to post which Pu'er they're drinking on any particular day... It was started in 2008 and has over 7,000 posts!! It's likely the longest continual written conversation regarding tea in the history of the internet.
I wonder if the length of threads here is limited for conservation of server space?