CSS isn't separation of concerns, it's just separation of filetypes. The problem with inline styles was that you had to repeat them all over the place. This is

CSS isn't separation of concerns, it's just separation of filetypes. The problem with inline styles was that you had to repeat them all over the place. This is not the case with Javascript, since it's a programming language and it has an import system. I feel like the sentiment that JSX and JS CSS break separation of concerns is cargo-culting what separation of concerns is all about and why it's useful.