It peaked at 4.05% in March. The last 2 months it went just below 4% as the Unknown category increased. For June the reverse happened, so 4.04% seems to be the real current share of Linux on Desktop as desktop clients were read properly/werent spoofed.
I could install a full fat kde on the entertainment system of a car - still wouldn’t call it a desktop PC.
You can plug in a keyboard, mouse, and monitor