Tailwind's philosophy is that you must not use CSS facilities at all and instead all their utility classes should be inlined into the HTML soup.

This leaves framework components as the only abstraction boundary, but that means if you're writing plain HTML without a framework there's literally no way to standardize your design system.

That and the huge soup of classes in DOM is (part of why) I don't like Tailwind... but that ship sailed a long time ago.