What does 50,000 hours of craftsmanship mean?

A few weeks ago, I suddenly had the idea to calculate how much time I had spent on programming (including learning). This led to some reflections. The calculation formula is as follows. Average hours per day × Number of days in a year × Total number of years I started programming in the spring of 2013 and decided to fully commit to it in 2014. On average, I spend between 5 and 16 hours a day…