You don't have to apologise to me for using Mathematica. My professional goal is to make sure that you will some day have no need for Mathematica, just like you

You don't have to apologise to me for using Mathematica. My professional goal is to make sure that you will some day have no need for Mathematica, just like you probably have no need for Internet Explorer in the face of Chrome or Firefox. If my goal hasn't been met yet, it is me who should apologise. I'll keep working towards that goal.