He will be missed.
I just wonder why they keep referencing Karate Kid. I will remember him first of all as Arnold on Happy Days. The series was not the same after he left.
He also worked and worked, according to imdb he was in 103 different movies in his 40 years working and did a bunch of TV appearances starting back in 1964.
http://www.imdb.com/name/nm0001552/