- You don't want to give more priority to non-Linux users
- GTK feels terrible on those other platforms
- You don't believe those who care about licensing issues would use it
- You cannot build releases or installers for Mac
The first thing that comes to mind on reading your response is that the non-Linux users are a market you are not really interested in - and even if they were they are not a market you can effectively serve (installers, updates, issues).
You should consider formally abandoning official support for non-Linux, as in reality you don't currently have actual support for them anyway. Be honest, cut your losses, and choose your customers. Cross-platform is not a benefit if it is unsustainable.
Well, it's not exactly unsustainable - the Github CI continues producing those builds without me having to do anything for it (it in fact didn't break even once in the past year, compared to several breakages on the "backwards-compatible" Ubuntu 18.04 deb which happened whenever Github changed something about the package bundle available to that image). If someone reports a bug on Windows, I will look into it, and/or spend some time walking them through a workaround (since I do in fact have access to Windows setups). As I see it, in the most natural sense of support, I do have support for Windows, even though it is what I guess you would call Tier 2 support.
To nitpick a little, I also didn't say I don't think that those who care about licensing issues would use [the Windows build]; rather, I think that those who don't care about licensing issues and are on Windows would not use it, because there is a Windows-only product that is closed-source which I am unlikely to be able to compete with on that ground.
- You don't want to give more priority to non-Linux users
- GTK feels terrible on those other platforms
- You don't believe those who care about licensing issues would use it
- You cannot build releases or installers for Mac
The first thing that comes to mind on reading your response is that the non-Linux users are a market you are not really interested in - and even if they were they are not a market you can effectively serve (installers, updates, issues).
You should consider formally abandoning official support for non-Linux, as in reality you don't currently have actual support for them anyway. Be honest, cut your losses, and choose your customers. Cross-platform is not a benefit if it is unsustainable.