Once, there was a study, involving professional violinists, the outcome of which resulted in the world being told that if you wanted to get really good at something, you need to do it for 10,000 hours.
The internet is full of productivity and professionality tips and every once in a while, I come across this “and you need to do something for at least 10,000 hours before you get good at it”. As the original study related specifically to a very small proportion of people talented in a very specific skill, I’ve never felt happy about it being generalised to, for example, programming, Linux administration.
I want to live in a world where the driving force underpinning people’s work is an attachment to that world, and not the ticking off of hours. You can do something for 10,000 hours and tick off those hours but if you don’t do it with passion, you’ll get limited benefit from those 10,000 hours.