Have you worked through the entire context of this approach? There was little reason for an 3rd party developer to spend resources to produce a Mac/Linux port

Have you worked through the entire context of this approach? There was little reason for an 3rd party developer to spend resources to produce a Mac/Linux port during Windows' heyday. Except as a labor of love. But Apple doesn't own 90% market share. It's split, and growing toward Android. There is no sensible reason for developers not to develop for BOTH platforms, until it is no longer profitable to do so.