I’ve always been very influenced by those things too OP so I know the feel.
I think it was just this huge wave of millennial creatives around the mid 2010s who treated anime like it was God’s purest mana (not that I don’t like it but these people were basically the embodiment of the thing, Japan meme). Stuff like SU, Undertale, OK KO etc that heavily took cues from older anime tropes. Then you had a whole wave being inspired by that stuff but far less inspired and more watered down, on top of that older cartoons and media from the first half of the 20th century is much harder to access now than the pre-streaming age and those influences fall out of favor in place of anime and wannabe anime clones.