First, /fantastic/ clarification. As for "terrible for growth", I'm referring to... well, mostly nevermind, because on a re-read I don't get the same sentiment

First, /fantastic/ clarification. As for "terrible for growth", I'm referring to... well, mostly nevermind, because on a re-read I don't get the same sentiment from you at all! But to clarify anyway: At low values, the degree to which you are safe to make mistakes correlates with the nurturing-ness of the environment. (At high values, you get spoiled). If team bonding only happens over successes... well, are you free actually to make mistakes? I think I got hung up your examples of a "day-to-day" interactions being end-of-story success moments, making it easy to forget that that also includes the planning, brainstorming, putting out of fires, etc.