Here’s an article from 1995 that talks about how 737 pilots didn’t know they had to turn off auto throttle on takeoff abort - https://www.csmonitor.com/1995/0821/21082.html

I wonder how software testing will change (if at all) in the industry post this revelation. There was an old joke during 777 development (Boeing’s first full fbw) about the difference between airbus and Boeing software testing architecture - airbus used formal techniques and Boeing put the software engineers on the first flight.