I have noticed the same, I have worked with probably 500 developers in my 10 year career - I do a lot of integration work, so I communicate with developers at e

I have noticed the same, I have worked with probably 500 developers in my 10 year career - I do a lot of integration work, so I communicate with developers at external companies a lot, I would say only ~5 of them contributed to open source, so roughly 1% Lots of them wanted to - but it was just a matter of time ... they have full time jobs, families etc