It seems like there’s a new celebration of the “ Saturday Night Live ” legacy every other month at this point. Last year, there was the late-night variety show’s 50th anniversary special, a star-studded affair with cast members old and new, celebrities aplenty, musical performances, sorely missed recurring characters from the days of yore, and plenty of jokes at the expense of the show’s creator and producer, Lorne Michaels . To accompany the special, Peacock aired the four-part docuseries, “SNL50: Beyond Saturday Night,” diving deep into aspects of the show fans don’t often get an intimate glimpse of. Then, there was “Ladies and Gentlemen . . . 50 Years of SNL Music,” a feature-length documentary directed by Questlove about the show’s truly iconic and totally unique musical performances.…