Original Commentary
Because they each have their strengths and weaknesses. Copying machines are so easy. Except when they aren't. There's a copy machine at work and I have no idea how to use it. It keeps feeding from the top instead of copying what I put on the glass - Terrence

Modern Commentary
The thing about both coffeemakers and copiers is that they're at an awkward point for user interface. If you have a copier that literally just makes copies and has one button, that's amazing. But if it does eight things and has three buttons, it's going to be impossible to use six or seven of those functions. - Terrence