I don't know, I really love a well-typeset books/papers. Especially when they feature figures that are deliberately placed close to the relevant section in the text, it's just not something we can replicate with HTML, that can barely do proper justified text.
Sure, I would like that beautifully designed page to magically become a single column beautiful document on my phone, but I will take the former over a badly designed text extract where the relevant figure is 10 pages away.
Epub (=html) is good for novels, but there is nothing replacing PDF for science papers. If anything, the latex (or ideally typst) source would come the closest, if properly written (not absolute offsets). That could be used to produce different page sized versions.
Sure, I would like that beautifully designed page to magically become a single column beautiful document on my phone, but I will take the former over a badly designed text extract where the relevant figure is 10 pages away.
Epub (=html) is good for novels, but there is nothing replacing PDF for science papers. If anything, the latex (or ideally typst) source would come the closest, if properly written (not absolute offsets). That could be used to produce different page sized versions.