This is big. Basic functions are a large reason we've had so much tooling around CSS for a long time. First with preprocessors, then with with CSS-in-JS. Making

This is big. Basic functions are a large reason we've had so much tooling around CSS for a long time. First with preprocessors, then with with CSS-in-JS. Making this native, and able to run at the browser level will solve a large portion of the theming and CSS-at-scale problems that most of us have jumped to extra tooling to solve. Over the past few years CSS is getting better and better. They're really pushing back on removing reasoning for using anything but the vanilla defaults.