Computers do not save paper, we are wasting more paper than before because of computers. How many times did you say, let's print and see how it looks? then you end up printing it 10 times.

In the era before computers, you "type" it only once, with correction ink always nearby.

Xerox, used to be the king of copy machine companies, was worried of that impression that we will go all digital, hence they were worried that their copy machines will go obselete soon, never happend.