The average Linux desktop does not even come close to having a design as thorough as this, much less a full-blown, actually usable implementation of said design. Frankly, 99% of Linux desktop installs used by developers I've ever seen are nothing more than single-user systems with everything running under a user account that is morally (and in practice, technically) equivalent to root.
The bar for desktop security in the Linux world is actually very, very low.
The average Linux desktop does not even come close to having a design as thorough as this, much less a full-blown, actually usable implementation of said design. Frankly, 99% of Linux desktop installs used by developers I've ever seen are nothing more than single-user systems with everything running under a user account that is morally (and in practice, technically) equivalent to root.
The bar for desktop security in the Linux world is actually very, very low.