Chico Escuela and Father Guido Sarducci - Why do they seem to be forgotten?

I was a kid in 1970s and I remember those characters well. We would always talk about SNL on Monday morning at school. Both Escuela and Sarducci were left off of the 50th anniversary show. Escuela may have been a very small line, but we would always repeat '"Baseball been berry berry good to me." Farther Sarducci was a more iconic of the time and I would look so forward to him being on. Thoughts on why they seem to be ignored as part of the SNL history and not remembered on the the 50th Anniversary special. Is it because Garrett Morris and Don Novella were a small part of SNL and never blew up beyond a few characters?