Here's the thread where it's being announced: https://forumserver.twoplustwo.com/5...anges-1765461/

Chuck Weinstock, their system administrator, is claiming that this is necessary because their version vBulletin is no longer supported (true), and they will not be issuing security updates (also true).

However, this makes no sense. vBulletin version 4 (what they use, and also what PFA uses) is stable and doesn't have any known major security flaws. Why switch now? And if they really must switch, why not go to vBulletin 5, which IS supported?

Here's the awful software they'll be using: https://twoplustwo.vanillacommunities.com/

Everyone hates it. This is very bizarre.