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’m not sure that’s really a good argument. I can connect an android smartphone to a monitor, keyboard and mouse and call it Desktop. It’s also just an arm64 or x64 based PC just handheld.
A Desktop PC IMHO is a device that is used for everyday “office” work and neither android smartphones nor steamdecks are that - but laptops for example are (IMHO)