Those are big and bold claims with no data to back them up. Here are two mental models I used successfully to reason about teams. One is the idea from Team To

Those are big and bold claims with no data to back them up. Here are two mental models I used successfully to reason about teams. One is the idea from Team Topologies that whenever a member leaves or joins a team, you get an entire new team. This new team has to go through the phases of a team again (form, storm, norm...). Also teams are entire entities that are bigger than the sum of their parts. That's why a single person leaving a team can have an outside impact in the performance of said team. Another idea is the Dead Sea effect [1]. This stipulates that high performers will tend to leave teams because they can, while low performers will stay behind. [1] https://www.google.com/search?q=dead+see+effect&oq=dead+see+effect&aqs=chrome..69i57j0i13l5j0i22i30l3j0i15i22i30.2658j0j7&sourceid=chrome&ie=UTF-8 https://www.google.com/search?q=dead+see+effect&oq=dead+see+...