The sad fact is a lot of the folks are moving on finally in SNL land. Lorne couldn't keep the talent around forever and its sad...but he really had a long run with a few of those 7 that left.
Melissa Villaseñor : 6 seasons
Alex Moffat : 6 seasons
Aidy Bryant : 10 Seasons
Pete Davidson : 8 seasons
Kate McKinnon : 10 seasons
Kyle Mooney : 9 seasons
The other cast member was only around 1 season but these folks all had huge runs on the show. Which normally had in the past 5 seasons and gone turnover.