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.
If only linux gaming and thermal became more and more robust, in few year I will switch too with pleasure. Adobe suite can still be a problem but not for me anymore at least.