Guys this 10,000 hours thing is really misunderstood and misquoted.
Its comes from work in the 90s by mostly
Dr. K. Anders Ericsson and some others.
Its not 10,000 "doing". Ericsson found that the difference between expert performers and the good performers was that the so call experts or the one recognised as be at the top of their field had engaged in deliberate practice of at least 10,000 hours.
Just doing does not make you an expert. To take techs example how many apprenticeship become true masters? Close to none but most have logged 10,000 by their 4 -5 year. They become competent but not top of their field.
The 10,000 hours thing is now quoted as 10,000 hours to success. this is exactly the opposite to what the studies, and there is a heap of them, was proving. Lots of people clock up 10,000 hours doing. Few become masters in their field.