>Windows (which does not require that kind of crap, hasn't for many many years, and only the odd driver with an idiotic installer script even asks the user to consider rebooting these days)
In fact, Windows does rather better than Linux does in this regard in that it's possible to replace the graphics driver for a running system with little more than a quick flicker.
In Linux you *still* need to restart X, which in practical terms is not much different for the desktop user than rebooting.
(I'm hoping dynamic reconfiguration is something that Wayland will improve upon, if it really gets off the ground)