Not speaking for the parent commenter, but I imagine "casual" as roughly the same range as "preppy" - not formal, but not sweats or tshirts.

Also, while they used the term "skater" (which I also find oddly specific) I think "streetwear" would be a better label. This would cover more specific styles like "skater" as well as other types of streetwear.

As a disclaimer, I know next to nothing about fashion and am just going on my own limited perception of broad categories.

Agree, streetwear would be a better term. Its more of my upbringing where kids who didn't dress in one of the other ways tended to go to stores like pacsun, zumiez, vans etc which prominently featured skating as a lifestyle.

I suppose it depends on what exactly you mean by "preppy" - but if it's stuff like cargo pants, I would argue that it should fall into the comfort segment.

About half of my daily wardrobe is stuff that's advertised as "tactical", but the reason why I actually wear it is because it's comfortable (relaxed fit, stretchy fabric where needed etc), and because it has plenty of large pockets to carry all the gadgets and random items.

The list also missed formalware which, I assume, is still a thing.

Intent is business/formalware is under same umbrella (you're wearing a suit of some type)