I checked the stats for the last 4 years here and it looks really strange. Statistics isn’t my thing… But it looks like it’s wise to be cautious and not to fully trust the numbers.
Around the beginning of last year there was a huge dip in the Windows market share that seemed to be correlating with a peek in “unknown”. Windows then catched up in a somewhat erratic matter.
Mac OS also shows a weird behavior. Starts at 16%, up to 21% and the down to 14% between October and November…
It’s not likely that a huge number of people decided to buy a Mac and then trash it I’ve month later. Samr but opposite goes for the windows stats.
I think it looks like there is an uncertainty of more than the total market share Linux is shown to have…
Not saying that Linux isn’t increasing on desktop market share. Just saying that numbers seen to have quite a bit error margin and to be cautious if referring to these numbers.