You say, "But I challenge you to find something in any of that which is concrete enough to be actionable." So, you might have missed this part: Of those Google

You say, "But I challenge you to find something in any of that which is concrete enough to be actionable." So, you might have missed this part: Of those Google teams, the ones that adopted a new group norm -- like kicking off every team meeting by sharing a risk taken in the previous week -- improved 6% on psychological safety ratings and 10% on structure and clarity ratings. Teams said that having a framework around team effectiveness and a forcing function to talk about these dynamics was missing previously and by far the most impactful part of the experience." So ... simply taking 5 minutes to talk about the risks taken in the previous week can help develop the environment. Of course it needs to be a positive discussion. Start it with the premise of: "how did we stretch our bounds last week even if it didn't work out?" rather than "what did we screw up this past week?"