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 just saw the news for Nexus mods like 20 minutes after I posted that. Hopefully it can be integrated well soon.
But yes, over time, things will continue to get better. Even Nvidia finally started working on open drivers for their GPUs.