He's really one of those few people who hit it out of the park with so many movies early on in his career that helped define 80s comedies. It's amazing he could have lived off those early movies and could have stopped working 30 years ago but he just kept on.
I'm sad as well because as much as I knew a 3rd Ghostbusters might have really sucked I wanted to see it just to see those guys all together again and take my son (almost 9) who loves those first 2 movies who I saw myself in because I was fanatical after that first came out. I wonder if maybe they might do it to honor him. Even though it wouldn't be the same.