If he had a bad experience with a particular product and there is a replacement he feels better about I don't think that makes him irrational.
I don't do MAC but figure you can check email and surf with it just fine. I don't think he is missing out on a computer experience. He uses the computers as tools. They have no need to be on the web anyhow.
Now why am I defending a Mac guy

Oh! I remember, preferences and past experience make us all look dumb to those that have opposing views.
Did you know the Harley in heavy slow traffic will stop its rear cylinder running just fine on the front single to save the rear and prevent heat to the rider and the motor when the two cylinders are not needed for performance.
Now I think that is pretty cool technology!
