We have had a very stable gaming group that has even had players return from out of state multiple times! There are five core players who have been gaming together for 13 years and 3 of those have been gaming for 17 years. Another "latecomer" has been gaming with us for about 7 years. Other players come and go but we have remarkable stability, probably because the game is secondary to our friendships.
As for Crisis, we only recently had a time-shifting event that has permanently altered our universe. It was, of course, played out and we still haven't returned to the game to see what has changed. This is not a retcon with an excuse. This was a time travel story that exploded in the players' faces! And for some reason we are all very enthusiastic to see what has changed.