We've changed forum software before. There is always some disruption when transitioning software, but of course we'll try to keep it to a minimum. You won't need new accounts, and most account features should transfer over. Old threads may be archived, but we shouldn't lose active ones. Of course, there's always the possibility of glitches affecting those things, though. Mostly, the buttons will be in different places and there may be some new functions. I don't believe it's scheduled to happen soon, though.