[seivan]

You're missing the idea here. The idea is that the front-end engineers don't have to deal with styles anymore.

They can just take a <Tab><Item/><Item/><Item/></Tab> and expect those components to be designed inside of the components themselves.

This is var more similar to how iOS handles design. You have your own custom views with their own style defined, obviously on some you can override them, but usually they are defined inside the class itself.

It makes sense for Web to take this route, given how hard it is to design on the web compared to iOS. At least for me :)