I agree with you. I think that what happens once one is at the top of their game is that the chance of complacency rises and innovation is halted possibly for a fear that change will cause a downward trend. I guess that could be a form of tunnel vision. I also see your point that a project can meet it's lifespan and even if it could continue to be improved it is better to start from scratch with a new direction. These are some good things to think about. Keep up the good work.