After doing this for a couple decades all told, I don’t think I agree. It’s just not the case, and I think a more objective look at true limiting factors vs. assuming more is better - in many regards - will serve a lot of young bodybuilders well, allowing for greater longevity and less strife.
Bottlenecks to muscle growth are generally energy (glycogen / carbs), recovery, and all the things that affect those two- sleep, the state of the nervous system, central and peripheral fatigue, etc.
There is still a small part of me that wonders whether just supplying a crazy amino surplus leads to greater growth, but I doubt it, and I certainly couldn’t explain a viable mechanism for that being the case. Or at least the body mass conversions don’t scale as you get heavier.
I think we already have some good case studies along the younger crowd- the 20-somethings who are really getting after it but also combining that old school work ethic with some modern refinements. People are posting their diets and full days of eating all over the place, and there are plenty of guys getting huge and strong on modest protein intakes with tons of carbs.
So, maybe up and comers don’t need to bear the digestive stress and financial burden of 8-10 oz of cooked meat 4-6 times per day