Ever since they introduced the e-visa I've always printed copies of ours and taken them with us, kept with passports. As yet we've never been asked to produce them but in the event that we do they'll be there. Can't see what the problem is really if it might be the difference between going, or not going, on holiday.
We have friends who are going to Calis and Turkey for the first time this summer. We've told them all about the visa issue and they are quite happy to print theirs off.