One thing that's been on my mind, which I couldn't decide whether to bring up here or in the Nick at Nite thread I started long ago (and I couldn't decide if this is worth bumping a thread that's been inactive since 2018), but from 1988-1992, Nick at Nite aired Looney Tunes, and for a brief period in 1998, Nick at Nite ran Rugrats and Peanuts specials on Sunday nights. Anybody know how the ratings went?
All of these were also being shown on Nickelodeon. Looney Tunes on Nick at Nite must have had some good ratings if it was on for four years (almost as long as a sitcom successful enough to enter syndication) before limiting its showing to regular Nickelodeon (I also wonder if getting more of the Looney Tunes shorts that the general public likes as well as showing less of the black and white shorts have anything to do with that).
Meanwhile, the period of showing Rugrats and Peanuts specials on Nick at Nite was very brief. Could they have thought of cartoons, even those with plenty of adult appeal, as being too "for kids" to really show on Nick at Nite (though even then, it was only once a week)?
I don't know if anybody here knows the answer, but it is something to think about.