I think this goes to the importance of promoting on talent, not years of experience. Good developers look at what they've done, and critically analyze what is

I think this goes to the importance of promoting on talent, not years of experience. Good developers look at what they've done, and critically analyze what is good; what can be improved; and what needs to be replaced. It's these people that you want to promote and provide with enough autonomy to do what needs to be done.