In response to Wayland Breaks Your Bad Software
I say that the technical merits are irrelevant because I don’t believe that they’re a major factor any more in most people moving or not moving to Wayland.
With only a slight amount of generalization, none of these people will be moved by Wayland’s technical merits. The energetic people who could be persuaded by technical merits to go through switching desktop environments or in some cases replacing hardware (or accepting limited features) have mostly moved to Wayland already. The people who remain on X are there either because they don’t want to rebuild their desktop environment, they don’t want to do without features and performance they currently have, or their Linux distribution doesn’t think their desktop should switch to Wayland yet.
Outside of your fantasies high DPI works fine. Modern QT apps seem to pick it up fairly automatically now and GTK does indeed require a variable which could trivially be set for the user.
Your desktop relies on a wide variety of env variables to function correctly which doesn’t bother you because they are set for you. This has literally worked fine for me for years. I have no idea what you think you are talking about. Wayland doesn’t work AT ALL for me out of the box without ensuring some variables are set because my distro doesn’t do that for me this doesn’t mean Wayland is broken.