Since they do not maintain a throttle vacuum, they are not subjected to the same engine braking effects. (en.wikipedia.org)
This sharp and sudden engine braking effect can cause your rear wheel to lose grip and induces extra wear on the transmission and final drive. (mechanics.stackexchange.com)
In coasting mode, the engine in the new 7 Series freewheels on deceleration with no engine braking effect thereby reducing fuel consumption. (bmwblog.com)