Earlier quoted context omitted.
I agree with your points, except this: > thanks to the Steam Deck [...] but I would be reluctant to call that Linux Desktop anymore than I would call Android an uptick for Linux. The Steam Deck very much runs Linux Desktop. Android runs the Linux kernel, but everything else is different. SteamOS is a Linux distribution based on Arch. If you run your Steam Deck in "desktop mode", it is very much a Linux Desktop (with…
If your belief is that Steam Deck is Linux Desktop then you need to count Switch/PS5/Xbox as desktops as well and take those into account with the OS percentages.
It's not exactly a belief, it's my experience.