It seems like Linux on desktop has never been more popular according to these sites:
https://gs.statcounter.com/os-market-share/desktop/worldwide...
https://www.netmarketshare.com/operating-system-market-share...
It's not surprising either, considering all of the ads and metrics collection Microsoft has added into windows recently.
The big green guy is the new Logitech software suite that I need to use to set the sidetone on my new headset, which asks you at install time whether you want to enable telemetry yet doesn't actually let you proceed until "yes" is checked, and which is completely redundant to yet distinct from the old suite (which new versions of the same headset model don't work with) and works less well. The other aliens are update pop-ups.
If you conclude that desktop is getting less relevant (as I think parent alluded to in the last paragraph), then its improvement within the segment doesn't need to be sufficient.
In what concerns Android and ChromeOS, it is as relevant as WSL on Windows for the regular consumer, specially on Android where it isn't part of public APIs.