It really depends on degrees. I've seen apps that were so bad, I couldn't even figure out what to do. It could be mathematically provable under the hood, but if I can't even figure out how to use it, or if the experience is bad enough, I won't care how well it is implemented.

They are one in the same. It’s not zero sum. You don’t sacrifice function for form nor should you sacrifice form for function. They should be the same thing. Form follows function — form shouldn’t be tacked on at the end.

We aren’t talking about the color of the paint, we are talking about the way the parts fit together.