I include microformats on blog sites, but at scale the challenge with microformats is that most existing tooling doesn't consider class names at all for semanti

I include microformats on blog sites, but at scale the challenge with microformats is that most existing tooling doesn't consider class names at all for semantics. Browsers, for example, completely ignore classes when building the accessibility tree for a web page. Only the HTML structure and a handful of CSS properties have an impact on accessibility. Class names were always meant as an ease of use feature for styling, overloading them with semantic meaning could break a number of sites built over the last few decades.