I could attest to that. I tried showing Zoboomafoo on youtube to a kid whose mom did like the show bach at the early 2000s but the kid was not interested and instead wanted to watch dinosaurs and monster trucks.
If it doesn't have CGI animation or if the jokes aren't only gross bathroom humor (and this is coming from a guy that enjoys bathroom humor), then no kid really cares. Not to get off topic, but good cartoons, like the 50s Looney Tunes or Ed, Edd n Eddy or even Chowder and/or Jimmy Neutron were great, and I rewatch these all the time...
To be fair, when people already call tortoises turtles (I mean to an extent they are not wrong) you may as well expect people to be okay with the ammount of "turtles" they have
It's also a language barrier. My dad is from Argentina, and he calls tortoises "dirt turtles", but not because he doesn't know, but because in Spanish they're just called
tortugas, which translates to turtles and/or tortoises. Specifically,
tortuga de tierra: dirt turtles
Yea the only cultural relevance I know of jackals is that here in Turkey witty and cunning people are sometimes referred as jackals. Otherwise I have never seen a relevance of jackals based on my experience living in a country with jackals my interaction with people of other cultures.
Even jackals in pop culture are forgotten. The Jungle Book (book) had a jackal that would follow Shere Khan, but he's practically absent in the films. Also, Marvel has a villain named The Jackal, and not many people know about him