yes HTML and CSS have went unhinge without question
big reason for that is that they where not designed for modern requirements like being used as a general purpose application UI toolkit
especially CSS was designed printable documents, not modern websites
and HTML was designed to represent the core semantic structure of a "classical" document (and not a too fancy one either), with minimal formatting (e.g. bold, italic, underline) but even on old websites it was very common to not be used like that at all (e.g. think old table for the whole site to create header and side bar tricks, now doable nicer with HTML5/modern CSS)
so its kinda a markup and style language chosen in the very early internet days only to realize shortly later that websites develop in a direction very mismatched to the designs of both languages (but both happen to be squeezable into their new roles, barely).
Kinda funny. But not really the situation behind OOXML.
big reason for that is that they where not designed for modern requirements like being used as a general purpose application UI toolkit
especially CSS was designed printable documents, not modern websites
and HTML was designed to represent the core semantic structure of a "classical" document (and not a too fancy one either), with minimal formatting (e.g. bold, italic, underline) but even on old websites it was very common to not be used like that at all (e.g. think old table for the whole site to create header and side bar tricks, now doable nicer with HTML5/modern CSS)
so its kinda a markup and style language chosen in the very early internet days only to realize shortly later that websites develop in a direction very mismatched to the designs of both languages (but both happen to be squeezable into their new roles, barely).
Kinda funny. But not really the situation behind OOXML.