Growth doesn't cap out, but it becomes only a slight upward. I'm a C++ programmer I can become better by using C++23, or I can learn rust. Both would be paths to growth, but since I'm already good at programming the difference will be minimal. Both would be worth doing, but the difference would not be very significant.
I was specifically referencing income growth via programming career. I didn't make that clear. I referenced it here but not in the opening statement. Personal growth for the sake of personal growth is boundless.
>You've mastered the highest paying technology, you've moved to the highest paying location, etc.