I think you may have re-discovered the S-curve? The y-axis isn’t forever. Once you plateau, it’s time to change the definition. Then a new S-curve can begin.

I think you may have re-discovered the S-curve? The y-axis isn’t forever. Once you plateau, it’s time to change the definition. Then a new S-curve can begin. Over time you observe periods of quantifiable growth interspersed with discrete jumps. That said, I believe the core of y-intercept advice hides two key wisdoms: a) don’t be discouraged when you’re new, and b) don’t rest on your laurels when you’re experienced And perhaps c) if someone is both way better than you and improving faster, you’ll never catch up. This is why I never pursued competitive boxing, for example. Don’t have the talent.