Organized Play official events require authentic cards, but nobody is stopping people from using a printer for kitchen-table style games.
Personally, having used printed paper inserted over top of a real card, I'd rather stick with real cards. Otherwise, I'd just go digital in this day and age.
Personally, having used printed paper inserted over top of a real card, I'd rather stick with real cards. Otherwise, I'd just go digital in this day and age.