This is just not true. You can absolutely grep the soup (I do it daily). Most UI components share a lot of common baselines but include a specific modification for use in place (often a color or extra spacing). That means most of the time, the entire class string is unique to that element, even if the classes themselves are not. At most, you might have a couple of duplications, but then you should probably be looking at a template level component if the functionality is related.

`mx-4 py-2 rounded-xl shadow bg-green-500` is just as easy to global-search for as `notice--success`

Use the component library’s inspector/devtools to identify components. Eg in a React app, look at the React component tree rather than the DOM tree