Maybe it's more a issue of style of play for your body build?
A slow runner like myself, at 64 years old, cannot play a grinding baseline game against you youngsters, whether my racket is 12.7 oz or 10 oz strung.
So, facing old farts similar to my age, what ball will I ever face that I need a 12.7 oz racket to get the ball back with?
Most old farts hit at 32mph, and that's rating their first serves. Hitting a 32mh incoming ball with a 12.7 oz racket is a lesson in overkill, and inefficientcy.