Here are the "20 Top Urban Planning Successes of All Time" (H/T OnStreetLevel). One can quibble with almost every word in the title, including "urban planning". These places are all emerging (unplanned) orders that have have managed to be an amalgam that coordinates many plans by many participants. So if we stipulate a dose of bottom-up planning, then OK.
But a heavy dose of top-down planning can be seen in our own Portland, Oregon, which Wendell Cox examines here and sees as growing in all the "wrong" places -- in its most outlying Clark county. And that is not the way it was supposed to work out. So not only is "planning" not a simple concept, but neither is "success".