For example, CSS-in-JS is a way to solve the conflicts that plain old CSS can cause in a codebase of dozens of components and custom styles. However, in my experience at least, those problems are really just moved around rather than actually solved. We now have new problems, like what do we do with our global styles? Sure, we might have less CSS floating about the place and messing up our global scope, so to speak, but now we have dozens of custom styled components that we have to manage and maintain.