[Response] There’s some additional research about this. In fact, it’s not as much the quantity that matters, but rather the quantity of quality learning.

https://www.6seconds.org/2018/02/09/the-great-practice-myth-debunking-the-10000-hour-rule-and-what-you-actually-need-to-know-about-practice/#targetText=The%2010%2C000%20hour%20rule%20is,time%2C%20you%20will%20master%20it.