I'm still using my 32GB 3GS from launch day 2009, as I eagerly await the new 2011 model iPhone, whatever it ends up becoming. In any event, I'm still running iOS 4.2.1 and, after noticing today's debut of 4.3.4, I was wondering if there's any worthwhile reason for me to update the software? I don't have Apple TV so I can't make use of airplay, and personal hotspot isn't something I can even make use of, not that I would care to anyway. For those of you who have the most recent update, does it do anything for system performance or for battery life? Like I said, 4.2.1 was the last time I updated, and I wasn't really planning on updating the software again (just waiting for iOS 5 on the new hardware - whenever they decide to release it), but since it seems I'm going to have to continue to rely on my 3GS for the time being, and foreseeable future until we get some sort of announcement, is it worth it to update?