It can actually help everyone to write CSS more quickly and in a scalable and structured way. Not saying that everyone should and needs to get on the CSS-in-JS

It can actually help everyone to write CSS more quickly and in a scalable and structured way. Not saying that everyone should and needs to get on the CSS-in-JS train, but I'd certainly recommend any team of any size to investigate it. Also, it doesn't have any association with inline-css and -styling. What all new CSS-in-JS libraries do is generate actual stylesheets in a performant and sensible manner.