I think if you spend like 2000 hours in a narrow field, that is enough to become an expert. Given 20 years of experience you will of course be an "expert" on ma

I think if you spend like 2000 hours in a narrow field, that is enough to become an expert. Given 20 years of experience you will of course be an "expert" on many things. Btw that is some sweet looking graphs, but I think they would be even nicer if they where SVG instead of binary png's.