Honestly, I think Modern Western Animation is a necessary fandom distinction because there are so many different groupings of cartoons. You have Disney fandom, classic cartoon fandom, 70s and 80s and 90s Saturday Morning Cartoon fandoms, DCAU fandom, 90s Cartoon Network and Nickelodeon fandoms, 00s Cartoon Network fandom, just to get started. And anime fandom is there peskily forcing the Western qualifier. Modern Western Animation is a grouping of cartoon fandoms that I can make sense of and that actually needs to be distinguished from all the other stuff.