What if more Ninja Turtles existed among the four (now five)?

[neatoman]

Originally Posted by Coola Yagami

In other words, the Super Sentai kids barely had any personalities (I assume other than being do-gooders with a strong sense of justice) because they were just gonna change em the following year anyway? Wow.

Not exactly, they do have clearly defined personalities (usually) but they tend to be kind of broad archetypes. In that sense they're not too different from how the Turtles are depicted in the cartoons. It's just that the shows will only run for about 50 episodes, give or take a few depending on ratings and development of the next show. This means that whatever character development happens will happen within a set limit, they will change as people but they're not going to become that much more complex than what you see in the first 20-ish episodes.

Considering the target audience are kids that might only two or three seasons (if even that), keeping the same storyline going with the same characters for decades wouldn't be worth it. It's difficult to imagine some kid binging 2000+ episodes to get caught up. This probably also why so few cartoons ever last longer than three seasons, kids don't have dedication to keep watching and the longer a show goes on, the harder it'll be to find new audience members.