My wife thinks that old doctors are great at "I have seen this before", but that new doctors are better informed of new methods to threat those problems. ( I vote for keeping them both.)
New engineers, like my neighbour, apply new materials, the old guys still use rivets..(so to speak)
Nothing compares to an experienced hand using a scraper or fitting a dove-tail. (<-----the wood connection!)
When does it go from "lemme show ya, rookie." to " this is how we do it these day, old man."
I was particularly moved by a caller who said: " I have been in college to get my degree to do this job, I'm good at this job, and my only way upward is to become the head of my department. I am next in line and have been looking forward to my boss to retire next year. My boss runs 3 miles every day, he is as fit as a fiddle and is brilliant in solving problems for our company. On top of that, he's compassionate and a great friend to all that work for him... but when all is said and done, the sunnuvabitch is holding me back."
That last line cracked me up.