Reasonable arguments. But what's the connection with the article or a previous comment? Also I've found that most managers know they should keep their team rep

Reasonable arguments. But what's the connection with the article or a previous comment? Also I've found that most managers know they should keep their team replacable, but also efficient. And they often end up treating long term replacability for short term efficiency gains, again and again and again. So while it should be a real issue it is less often than we coders worry.