Earlier quoted context omitted.
I made these arguments two decades ago when I was still in university that PDF is a horrible format because it's purely præsentational, especially for people with disabilities whose software relies on semantic information. LaTeX last time I used it didn't even have a different symbol for uppercase Alpha and A because the glyphs are indistinguishable. They argued that PDF was superior because the publisher could contr…
For scientific articles pagination is still important, because it's how you refer to a particular part of a paper. If things like font size and line spacing are at the control of the consumer, pagination is not preserved. This problem is harder than you one would think naively.
Besides, in HTML one can directly link to the relevant part.