SNL with that crew created entertainment that appealed to the whole country. Then they went to Northeast US humor. Then to New York City humor. The rest of us were watching not understanding any of it. It became one big inside joke.
I quit watching the show in the early 80’s because of this.
The core of the Not Ready For Primetime Players, came out of The Second City, based in Chicago and Toronto, which also of course was the core of SCTV.