Now, say I wanted to become an expert in programming. To the point where I was an elite 10x developer. If I quit my job and lived off my savings, I could conceivably work on programming 100 hours per week. So after ten weeks I'd have 1000 hours, and after 100 weeks I'd have my 10,000. So that's two years or so at a minumum.

But living off savings for two years would be incredibly costly. Working full time would let me squeeze in say 20 hours a week, so I'd now take 10 years to reach the golden 10,000 hours or experience. If I cut down to a part time job, it would take 20 years.

I think the latter two are unrealistic because they take so long. The 100 hour per week option is more of a possibility. With universal basic income, everyone would have the opportunity. If lots of people pulled it off, the productivity gains for society would be enormous.

Obviously there's lots of people in society who have this sort of spare time and simply do not use it. However I think there's an argument that the people most likely to achieve this 10,000 hours goal are people who are gainfully employed and wouldn't pursue it without some sort of income support.