I've been that engineer at a particular time in my career. And saw others be that person as well, since. In my view, commonality between I and others I've know

I've been that engineer at a particular time in my career. And saw others be that person as well, since. In my view, commonality between I and others I've known with that behavior was that we came from a long multi-year project. After experiencing daily maintenance of big projects for a couple of years, you tend to have a strong opinion of things you don't want to see again when moving for greener pastures. It just seems to disappear with time. Maybe because at some point people accept that telling others what to avoid is pointless, people tend to learn only from their own mistakes.