Full physics solutions tend to cause objects to bounce and jitter around their environment, which would make things look extremely ugly at best.
Initially this is true but I just made a little physics game in Unity and they take care of that. The quaternion class has a slerp member (spherical linear interpretation) that basically does an interpolation to smooth the movement over time. It works and you get rid of the jittering. There are also parameters to influence the smoothness.
