Exactly! EPUBs are great for novels or anything you just want to read line-by-line

They're really great for anything I want to read on my phone, including technical books.

I'll take a slightly-less-great ePub over a PDF I have to scroll around or use terrible reflow heuristics via some reader any day.

Really, the point is, why can't we have both? I use and enjoy epubs extensively, but also in many contexts I strongly prefer PDF.

Getting a passable PDF from an ePub is probably significantly easier than the reverse, so I'm all for having both, yes! (And please don't charge me twice for the privilege, publishers.)

Each format has its strengths

PDFs on smaller screens - it’s like wrestling with the page just to read a single line