Billy Johns -deceased- had over 25,000 before he retired at 70.
I attended a party to mark his passing
30,000 hours in the mid-90's, and he was still at it.
Another of his ex-PX colleagues who is still fit and healthy, but no longer flying, has over 34,000, and he has turned 70 within the past 12 months.
I also recall that the late Tom Peninsa had over 20,000 hours (all in PNG except the first 180 hours) when in early his 40's; I think he had a little difficulty understanding the CAO 48 limits.