I’ve experienced the decline after someone leaves. I had a manager in my team who had been with the company for 42 years. I knew they kept things together, and they had become so unconsciously competent at what they did that it felt impossible to try and even identify what it was before they left. Now 4 years down the track, broken processes, lack of knowledge and skill in those left behind, has us struggling to maintain efficacy in a system that feels opaque. I don’t know how you mitigate this risk. We had others in the team who were there the entire time, but they don’t know how the work was done. We’re having to relearn decades of experience, judgement and knowledge.