Clickbaity title on the original article, but I think this is the most important point to consider from it:
After getting to 1% in approximately 2011, it took about a decade to double that to 2%. The jump from 2% to 3% took just over two years, and 3% to 4% took less than a year.
Get the picture? The Linux desktop is growing, and it’s growing fast.
If someone buys a Steam Deck and uses it only to play games then would you say they’re acting as a desktop computer user?
Again. We’re classifying an OS, not how it’s used. You can make the same remark about an asus ally, which runs windows, and will count towards windows desktop market share.