^^^^^^^^
this! this! this!!
20-rep squats make you better at one thing... 20-rep squats
they don't appear to bring any of what most people are presumably using them to build- Power Endurance..
I've had coaches who had me on volume weight work- as high as 12's- but that's for sure Hypertrophy zone- and its questionable how adaptable that mass will be once you drop reps.. maybe an ok route for totally novice lifters looking to build foundation.. but wouldn't be my choice..