These kinds of scripts are nothing new or exclusive to unity and honesty, unless someone works VERY HARD on a unity game, I have yet to see a viable standalone game let alone give the Outerra developers yet another engine to fiddle with, and one that requires a lot of babying at that [From what I have been observing]. I would presume a waypoint system built right into outerra using its already implemented road path creator tool would be a far easier implementation. HOWEVER. I will not say that the integration possibilities for Unity themselves are NOT a good idea, I just don't believe that relying on another engine/scripting method would be wise for an engine that already shows such standalone promise.