This is why CSS-in-JS solutions outshine utility classes IMO – if you deal with stylesheets directly, it's hard to avoid treating CSS as append-only files that grow linearly with the size of your codebase. With CSS-in-JS, on the other hand, the styles get generated for you, at a size that grows logarithmically to the size of your codebase (style rules of the same value get pulled into their own deduped classes).