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.
After seeing Garuda Linux set my user agent to Windows, I set my Windows install user agent to Linux.
Seeing Twitch.tv login break after changing my user agent was hilarious