More calories are gonna be needed for those who go higher and higher above their natural genetic limits. I used to be able to gain muscle on 4,000kcal per day for the longest time, but once I get over 240-lbs+, I have to continuously bump it up to put on muscle (ond of course weight gain).
At some point, it is gonna come down to increasing both calories and AAS use for serious lifters pushing the limits of growth.
BMJ