In today's uses, cascade _with_ custom properties (the vars defined within :root ) are powerful and are what I leverage when providing theme-able ui libraries. Dark mode, light mode, large mode can all be solved using custom properties which to me most exemplify the power of the cascade.
that is inheritance not the cascade: Inheritance allows for DOM nodes to use properties set on their ancestors, the cascade algorithm is how multiple conflicting rules interact and are overwritten.
Custom properties are by default inherited by all descendant nodes (they also interact with the cascade, but it is less relevant) and this can be used with tailwind in a couple of different ways: https://stackoverflow.com/questions/64872861/how-to-use-css-...
