Same here (>20 years at this point)—I just know how to do nearly everything with existing CSS features, or else I’m already using a framework like MUI that elim

Same here (>20 years at this point)—I just know how to do nearly everything with existing CSS features, or else I’m already using a framework like MUI that eliminates a lot of the issues the new CSS features aim to solve. For example, the unique class names and low specificity offered by MUI negates the need for the new container functionality. I’ve definitely used :has() though to replace the need for certain CSS combinators—for example, being able to style a label that wraps a checkbox based on the checkbox being checked, rather than relying on the next-sibling combinator while placing the label after the checkbox input. That’s pretty cool and solves some limitations that existed previously.