When I last checked, Bob is 96 years old and most of his clients are his age or older - they have been paper filing since dirt and you aren't going to change his stance.  I much prefer to e-file but to be honest, when I paper filed I never had a single return rejected, I never had to shag after people to give me their 8879 and I never had to worry if my internet went down on April 15th.  Paper filing works for Bob, so if he prefers it, let him do his thing.  He isn't hurting any of us by doing so.