Preventing any compromise of an X11 app from being easily escalated seems useful, and there's no usability hit for users. Developers have to update code designe

Preventing any compromise of an X11 app from being easily escalated seems useful, and there's no usability hit for users. Developers have to update code designed in the 1990s – which I should note most of us griped about even back then – but that's not especially onerous and has multiple other benefits.