Things age poorly.
Look at older games, some are still very playable today, but some are outright unplayable now, thanks to various improvements and changes to how games are played nowadays.
Shooters, for example, were played using one d-pad and four buttons, and not the twin sticks like we do now, and games didn't care if things were balanced or fair, because they were made by small groups of people who didn't have playtesters in an age where arcades were difficult on purpose to make you spend loads of quarters on them. Most games back then were glitchy as hell, too, but we just kinda dealt with it because that was the norm.
Shows can age poorly too, the biggest thing is probably how a lot of older shows had poor quality control and reused a lot of cels and backgrounds to save time, or would have Jim Cummings voice literally everyone. There was also the weird fad of bringing in IRL guest stars for their shows I'm looking at you Scooby Doo
, most of which are either dead, washed up, irrelevant, or in jail by now. In a more extreme example, a lot of older cartoons portrayed Japanese people as arguably funny
stereotypes with buck teeth and that funky nasally voice, women only cooked and cleaned, and black people were BLACK black with big red lips and said "finna" and "nigguh" also funny, IMO
a lot, something that wouldn't fly with the general public today.