The game has changed too much for anyone (in today's NHL) to even come close to Gretzky. Goalie training, coaching, and equipment are far more superior. Defensive systems and specialized coaching. The influx of European talent in today's NHL. All the stars aligned for Gretzky to put up those kinds of numbers.
For similiar reasons we will never see anyone hit .400 in MLB either. Unless of course, there are significant rule changes to increase offense in the future.
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