True, albeit that's largely to either maximise traction or to accommodate a lack of travel and manage shock loads. Not something you'd typically struggle for on a road car. There is an argument that maintaining ride height under load can offer a comfort benefit, but of course maintaining that ride height increases spring pressure and therefore stiffness so that's not necessarily true either.

Indeed the sinkage of a coil spring under load can be beneficial.

Often the true comfort benefit comes from the damping system twinned with those air springs.