Tangential anecdote: At one company I worked for, the guy in charge of ops had put a whole lot of work into standardizing the production environment and toolin

Tangential anecdote: At one company I worked for, the guy in charge of ops had put a whole lot of work into standardizing the production environment and tooling, and getting it all tuned just so. A couple years later, he lamented that new hires were achieving deep competence more slowly, and weren't reaching the same level of competence that previous team members used to. It wasn't a big deal most the time, but they made a lot of mistakes when rolling out new components, and tended to get caught flat-footed whenever something went sideways. He suspected that the problem was that, in its current state, the new system worked so smoothly that they could get away with understanding things at a very superficial level, and that hindered their learning.