alt Hacker NewsMany, many people want to double or halve documents.
Teachers at school would print (or photocopy) A4 in half to save paper, or doubled for the blind girl in my class.
I'd do it myself at university to save paper (money).
I don't print much nowadays, but I use this feature occasionally to print something as a booklet. I printed some lost board game rules on A3, since it was an A4 PDF.
Sorry, I should have specified "and have it look perfect".
People do that all the time with US letter paper, print two to a sheet, you just end up with slightly wonky margins and usually everything being more like 40-45% the size it would be doubling up A4 paper. That use case isn't really hindered.