keyboards are meant to be used without looking at them. with the introduction of the touchbar, you have to look at what you're pressing. it's like a giant touch screen in a car, it works, but you have to look at it, where as if you have buttons, you can find what you want to do by feel/memory.
on a personal note, i've randomly refreshed webpages because i've overreached on the number row with the touch bar.
TL;DR: DevOps makes a bit more than Full Stack.
DevOps: https://stackoverflow.com/jobs/salary/results?l=San+Francisc...
Full Stack: https://stackoverflow.com/jobs/salary/results?l=San+Francisc...