Salt Lake City
But does this not mean that the Swim skill has became obsolete?
You're confusing some points, I think. You're thinking that because you know how to swim you can just do that because you fell in the water. At the point you hit the water you were falling as a result of a failed Leap. You are not using a Swim ability at that time. So, it's not that Swim has become Obsolete, it's a matter of Swim not being used at that point, Leap was being used.