Like Littler, teenage phenomenon, is already competing with the best darts players in the world. I can see his development with similarities to that of a young chess phenomenon heading for super grandmaster status.
Darts, like chess, calls for high concentration levels. A drop in micro-concentration can lose a match in these and other sports where a momentary loss of concentration can bring the contest to an abrupt end.
In training and watching young chess players, I have seen evidence of that concentration lapse, without which the player would be on a par with far more experienced players. In chess this seems often to occur well into a game, and the result of which is an obvious blunder which can lead to immediate resignation ...