Disney had less cartoony styles too. And anime and manga also sometimes use styles that are less similar to what people think of when they think anime. Though your talking about manga being more similar to this isn't really true. Manga has a larger variety of art styles I'd say (though if you look at the entire history of anime it's not like there haven't been a variety of styles there either) but it's definitely not true that manga tends to be more "naturalistic" than anime and there's plenty of manga that have styles even more simplistic than you typically get in anime. In fact I've noticed anime tend to even upgrade art styles sometimes when the typical thinking is that anime simplifies styles to make them easier to animate.
>>3638I would not say 79 to 84 was as a whole more grounded and naturalistic. Fucking Gundam was 1979 and that has a lot of similarities to Hanna-Barbara cartoons in terms of style. People like to pretend that the "mature" OVAs they watch were representative of anime at the time.