What made Cartoon Network special was that it was a specialized channel FOR cartoons. I believe in the 70s and 80s, cartoons would air on curated blocks on ABC and CBS, hence the Saturday morning cartoon tradition. I think Nickelodeon did not start airing cartoons until the 90s either. That was unheard of for the time.
Ted Turner had acquired rights for several Looney Tunes era cartoons in the late 80s. Animation had begun to have a resurgence thanks to airing Hanna Barbara cartoons. Ted's philosophy was to have a station geared towards animation to take advantage of changing trends. Strike the iron while it's hot. It paid off tremendously.
Even more interesting, those cartoons that would rerun on Boomerang started as ABC/CBS/NBC programming. That license acquisition was Hanna-Barbera, which had lots of animation suites under their belt.
I think once in a while people here defend John K because they like his art style, or more specifically they like how it isn't the same exact lazy soulless CalArts beanmouth/digital puppetry that 90% of animated western media has become. There is something to be said about it that his work is unique and very expressive, BUT he's far from the best animator or the only animator that makes things that actually move. People who suck John K's dick have some contrarian breed of brain worms that convince them a self-taught pedophile's regurgitation of the midcentury UPA style is high concept avant garde work that needs to be praised as such, when really it's just pedo art that doesn't have a model to stay on.
You know how you can sometimes tell people are pedos by looking at them? That's how I feel about John K's art, personally. It's just creepy and weird and not even funny enough to justify it. It's like the bottom of the barrel of newgrounds animation, but with a budget.