I am not going to speculate on this because Windows developers are invisible to me, but I wlll say 90% market share probably does not map too well to the actual

I am not going to speculate on this because Windows developers are invisible to me, but I wlll say 90% market share probably does not map too well to the actual humans. Just think of the number of blue screens of death you see on public displays in all walks of life. Millions upon millions of Windows units are being sold not just for corporate workstations but for all manner of utility systems that don't even represent a single human. I can't really think of a better proxy though, given the weird parallel worlds that Windows and Open Source developers inhabit.