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 see multiple posts on reddit everyday asking for advice for migrating to linux. I think linux userbase is increasing a lot since Window’s questionable recall announcement.