I hate to disappoint those who use it as a crutch.
There is always room for improvement. You could reach a point where “improvement” is barely noticeable… And you can also plateau… The ability to break plateaus in development is what makes or breaks you in this sport.
“Obstacles don’t have to stop you. If you run into a wall, don’t turn around and give up. Figure out how to climb it, go through it, or work around it.”
― Michael Jordan
There really is no way of hitting a “max” where every moment of every day is completely dedicated to bodybuilding and recovery, with absolutely no slip ups in diet or lifestyle recovery factors.
There is also a certain point when every method that has been tried and invented can be utilized, and there can be little room for progress, based on what is known in the sport of bodybuilding today…But… This is where experimentation is useful (for advanced athletes and trainers)…. In the future supplements will be invented that will make modern lifters look like they hadn’t hit their “max”…. Just like today we know, that we could have seen a bigger Arnold, or Lou Ferigno, if they had access to whey protein, creatine, and pre-workout energy drugs (in addition to what had been invented at that point.).
Just want to point that out. If you have “hit your strength “genetic max”” you can still lose bodyfat. If you are 3% bodyfat, you can work on strength. If one lift plateaus you can focus on another and come back to that lift months later with a different approach.
There is always room for improvement. Implying that there is a genetic limit implies that we are capable of perfection