Epub won the ebook standard and killed the rest, finally we had only one format to deal with. Do not make me wrong, pdf still there for paper scan and print, or graphic intensive book format. But for the battle for Amazon mobi and epub, epub won and be the standard most of the device

Not sure for how you read in recent dates, for me there is a significant decline in the print book readings. It is not because of COVID-19 I am not going out, as if I want to read print books I can always buy from online stores. Just like my wife did, I prefer print