[lineslinger]

You kind of answered your own question rsimoes, by leaving the wheels hanging at the point of their mechanical limitations you are stressing those mechanicals to a limit very seldom seen in standard driving.
The components that limit the travel of the wheel....the bushings, springs,arms etc. are left hanging in an "unnatural" position thereby accelerating their usable life, in some cases even forcing certain components to reform themselves.
I say this because I had to replace some of the rubber bushings on the front
A arms of my Austin Healy, they developed a deformed memory from hanging too long and no longer seated themselves properly in their housings.