> any client could sniff any other client's events and windows That's a feature that I have used many times in the past. Isolation should be handled at the X s

> any client could sniff any other client's events and windows That's a feature that I have used many times in the past. Isolation should be handled at the X server level, where it can be handled without excessive complexity or require breaking backward compatibility. > default Locked down defaults and enabling features opt-in is good design. (Principle of Least Privilege) > Wayland Isn't compatible as it's missing required features (by design).