[znpy]

If I’m reading that long, I don’t need zooming and scrolling on my ipad.

Epub on ereaders work well but only if you’re reading fiction. Most images and almost all tables and charts have been messed up by epub rendering anyway. And ereaders are black and white, so you’re losing information anyways.

[broscillator]

right, this goes against what you said about rendering well everywhere, given how you mentioned your ipad. In any other device you will likely need to zoom and scroll constantly.

Tables and charts are also a specific use case. There's no mention of them whatsoever on the website so one can assume this is talking about mainly text.

In other words, you described the only time when PDF are more comfortable: if you have an iPad and you need to read charts/images/tables. Far from the claim of "they render just right everywhere".