I thought it was weird that "other" had such a high percentage 4.98% - but then I clicked on the more broadly grouped chart (https://www.netmarketshare.com/operating-system-market-share...) and it dropped to 0% - "other" meant other versions than those listed.
This is a much better chart than the one linked. The other chart, due to the way it breaks down versions, is a little misleading because of how it splits up market share of older OS versions (mostly with OSX, where only two versions are accounted for in the graph itself).
It really seemed like Linux and Mac were much higher up these days. A more interesting statistic would be "OS usage times" i.e. what are people looking at for the most hours. Probably nigh possible to get. Wait, advertisers probably know.
I think the perception of Linux and Mac being used a ton is only in some developer circles. Unless the do a bunch of programming outside of work petty much all the developers I know use Windows at home.