One of the Pilot Tea Rooms I used to hang out in between flights had a staff with many Old Git's with well over 20,000 hours and ten years or more to go before Retirement.
I once flew with a fellow who had 13,000 hours in just one Type of Helicopter.
The laugh was he was my Co-Pilot and I had about 500 hundred hours on type.
I paid close attention when he offered some advice or commentary.