We'd still get the same pressure to give an A+ to every interaction unless things were fucked. I used to rate three stars for what "performs as expected" until

We'd still get the same pressure to give an A+ to every interaction unless things were fucked. I used to rate three stars for what "performs as expected" until I realized that it's punishing good products. Switch to A-F would result in the same behavior, except it'd be Uber drivers trying to make a living instead of noxious parents declaring that their kid deserves an A.