Untethered softmod methods of booting into CFW without using RCM in the near future, and potentially untethered coldboot methods in the distant future, are reasons to stay on 3.0.0.Somewhat unrelated, but is there any reason to still be on 3.0.0? I've been busy with work for a few months, and all of the progress since is a lot to catch up on it seems.
If you don't mind using RCM to load CFW, there's no real reason to stay on 3.0.0.