Themes for HAX Sites will leverage a series of interchangeable components. These blocks help ensure that reuse across themes is maximized. Is this a requirement? No. But it helps in improving the standards encouraged by good theme design while maintaining the performance targets HAX seeks at scale.
site-menu to deliver the same UX with minor CSS variable variations for designThese approaches are actively being improved upon to allow for theme development to require less effort in development and put efforts mostly into HTML and CSS development.