> Unfortunately MathML doesn't get you proper typesetting in epubs (...)
Wrong. MathML is a part of the Epub3 specification. All e-reader implementations that comply with the epub3 specs get you proper typesetting in books published in epub3 format.
I guess it is you that is living in a dream world. There are no epub3 compliant implementations then, because none of them display math properly. If they were compliant, they would also run KaTeX just fine, because Javascript and HTML are part of the standard, too.
> I guess it is you that is living in a dream world. There are no epub3 compliant implementations then, because none of them display math properly.
To start off, you already have posts in this very discussion rejecting your misconception.
Secondly, mathml works fine when we have an epub3 reader opening a epub3 doc created by epub3 generators from epub3+mathml input. If any of those requirements aren't met, you get issues. This happens with each and every single typesetting feature, not just mathml. Would you claim that epub fails to support tables if you open an epub doc with broken tables?
Thirdly, a typical implementation shortcut taken by epub readers is to reuse whatever WebView they pick. If your epub reader uses an outdated or shitty WebView implementation, you get shitty epub docs.
Wrong. MathML is a part of the Epub3 specification. All e-reader implementations that comply with the epub3 specs get you proper typesetting in books published in epub3 format.