True, but most were not so widely taped and preserved, especially in an age when few people even owned a VCR. (And this is the only one based on a blockbuster film, AFAIK.) A lot of them will probably never be released because of music rights, or the masters could be lost. The liner notes on The Paul Lynde Halloween Special DVD mention it was mastered from the late comedian's personal copy. It's even more bizarre than the HS.

Part of the allure of the HS is that is was once nigh impossible to see unless you could scrounge up a copy. And a good many people too young to have seen it doubted the bloody thing existed. There were a couple one off specials from Sat AM in the 70's I had little evidence existed before the internet came along.