“Saturday Night Live” is undergoing some major cast changes ahead of season 48. On the heels of reports that Pete Davidson was exiting the long-running sketch series, three of his castmates departed in the season 47 finale as well. Kate McKinnon, Aidy Bryant, and Kyle Mooney all said goodbye to Studio 8H throughout the episode, which was hosted by “Russian Doll” star Natasha Lyonne.
All four of the actors have been on the show for eight or more seasons. That’s an impressive feat,…