This kind of thing is useful for web applications, specifically single page apps i.e. a situation where the user needs to have javascript to use the product / w

This kind of thing is useful for web applications, specifically single page apps i.e. a situation where the user needs to have javascript to use the product / whatever in question. Easily scoped and programmable css is very useful for self-contained, non-leaky react components. However, for a web page I agree it would be absurd.