Re: Picking the data that suits your argument
The Windows games market is literally over 100 times larger than Linux, despite the valiant efforts of Valve/Steam to provide the alternative. You'd have to be nuts to develop games for Linux except where its unpaid work for fun or a fairy godmother steps in. Windows 10 DirectX performance is considerably better than Windows 7 in critical areas and thats before adapting to DirectX 12. Vulcan should help level out for better performance on Linux over next year or so.
The slow arrival of 64 bit is really just a consequence of the slow upgrade rate in the PC world from the 32 bit version of Windows that ought to have been sent to the scrapheap 5 years ago. This meant some dev. middleware/engines...were going lowest common denominator 32bit for years with consequences to game devs that used it.