The main reason we dropped CC3 is that it doesn't fulfill our specifications at all. But if it had fulfilled our specifications, we probably still would have switched due to the instability of the program. However, that was in 2009, so it's quite possible that patches since then have cut down on its tendency to crash.
And you moved to FM8? I have a really sturdy machine but I keep getting "Out of Memory" messages. However, it does usually allow a save before you need to back out then restart.