For real. Just last weekend I was at a conference and realized that I left my tablet at home and the agenda/workbook for the event was PDF. I was pinching and scrolling with my iPhone while my colleague next to me opened up his Galaxy Fold and was reading everything fine. I mean, yeah, it's not a common need for me, but there's definitely use-cases for this--especially for people who have to read digital documents on the go a lot and don't want to have to carry extra devices just to do so.