I couldn't disagree more. I almost never use PDFs. I read a lot of books on my mobile phone and PDFs are basically unusable there due to their fixed layout. To

I couldn't disagree more. I almost never use PDFs. I read a lot of books on my mobile phone and PDFs are basically unusable there due to their fixed layout. To say in 2019 that a file format without mobile support is the most important is moronic.