I’m only exploring web components but I like the ability to go smoothly from regular <div> to custom element to element variations depending on attributes to some light JS conditional formatting depending on attributes, also it could be done in open or encapsulated way, then we can do heavier JS and callbacks… and at this point you can still transition to a framework.

Should browsers implement good customizable controls instead all that API? Probably but at this point I would rather have ability to make a good custom drop down with anchored popover API vs limitations of default control.