Start age didn't decide who got good. How you practise does.

In sport, deliberate practice explained about 18% of performance, and elite athletes hadn't started earlier as children. Audit your sessions, not your years.
S Evidence: strong. Large trials or many studies, pointing the same way.
C Evidence: contested. The research disagrees. Named, so you can stop worrying about it.
Macnamara et al. 2016. Contested: Ericsson argues stricter practice explains far more. Both sides agree quality beats hours.
Not medical, legal or financial advice.
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