stroker life span?

I don't know how it translates but a friend who used to race for Chrysler years ago said that he could get about 750 or so 1/4 passes before the motor started to lose compression. I guess that you could hammer it once a day for two years, LOL. Seriously though, it is probably ALSO dependent on the quality of the parts, fitting, and machine work. My guess is that todays rings, machining, and cylinder prep techniques have extended that 750 quite a bit. 20k on his stroker is also pretty arbitrary. Is that 20k grandma miles or is he thrashing the motor to within inches of its life every time he drives it???