[bitwize]

If it costs just as much money to support the long tail as it does to support 95% of your user base, guess what? That long tail will go unsupported. This is why the only relevant web standard is "does it work on WebKit (formerly IE)?" And why the only relevant firmware standard is "does it boot Windows?" The major distros ship with Wayland. The major toolkits support Wayland. That's where all the development and maintenance energy is right now. X is still around, but eventually support for it will go away. Once it becomes niche enough that the costs of maintaining an X code path outweigh the benefits of supporting the few users still on X, they will take the X code path out. That's how things go in software.