more market share for Linux increases the likelihood that devs will support Linux directly.

I'm starting to wonder if that's true. I thought so do but now I'm wondering, especially with compatibility layers like Proton, and even Wine before that, and plenty of tools like Electron, Unity, etc helping to be cross-platform, if the lack of support is rather due to bad habits instilled by years of Microsoft partnership with manufacturers (and thus driver support) implying that drivers must be kept secret and thus Linux support is "bad for business" and that then cascades down to developers then users.