[chaosphere2112]

> ... no need to make a NASA pen

As is frequently trotted out whenever someone reaches for this analogy, http://www.snopes.com/business/genius/spacepen.asp (tl;dr: pencils aren't great in space, another company invented the pen on their dime and sold it to NASA). There's definitely UX headroom when iterating on user input; the first gen touchbar has been undeniably meh, but that's not to say another iteration or two can't be a marked improvement over a 150 year old technology.