> It really doesn't matter, you're again conflating the "kernel" and "desktop" distinction that's important here

Right, under a post that says "Linux reaches 5% desktop market share".

to which I will just point to my earlier remark: bringing up that stat only matters if you actually use desktop Linux and want the marketshare to increase so Photoshop or Affinity Photo will be released and supported on Linux.

Steam Deck users spend the overwhelming majority of time in Game Mode / Big Picture. They care not for the Linux desktop experience, for they don't actively use it. If they don't actively use it, companies won't care about improving it.