What you've said may reduce paper but will not get rid of it. From your figures, 20% of parents do not sign up and 22% of the US does not have internet at home

What you've said may reduce paper but will not get rid of it. From your figures, 20% of parents do not sign up and 22% of the US does not have internet at home. These are non-trivial numbers. Also, your wife runs the lists on a volunteer basis so the cost of her time is not accounted for. It's great that there's a system working for you but that doesn't mean it would work elsewhere. Sometimes I want important messages to come via paper. I get through so many emails a day that one from school might easily get lost in a busy day whereas a letter would always stand out.