'SNL 40′: Maybe a four-hour clip job would have been better

"Saturday Night Live's" 40th anniversary special was mostly an exhibit of longevity, putting both its participants and its viewers in touch with our own mortality, in the kindest way possible.The point of the star-studded event, mainly, was baby boomer self-regard (it has never seemed more possible that some of the names on Lorne Michaels's A-list, maybe even Michaels himself, might not be with us when the 50th anniversary rolls around), with subsequent generations of "SNL"-ers offering the usua...