For me, a generational player is one who is clearly the best player over a period of time. We can definitely weigh in scoring, awards and so on, but also couple in the impact to his team and the game.
Look at Ovi… all those years of scoring at a crazy pace… was he more valuable or better than Crosby? Then there’s the all mighty Matthews and his ability to score… is he better than McDavid?
McDavid for me is generational. He made an immediate impact in his shortened rookie year (would had been a slam dunk for the Calder), and has never looked back. He’s won all the key individual hardware, and even something as casual as “fastest skater” at an ASG just illustrated what most knew about one aspect of his skills. He’s a regular season and playoff beast, and a highlight reel machine. Yes, he doesn’t have a cup, but its a team game and I don’t have to point out every post where people complained about the poor roster construction of the Oilers.
Not taking anything away from Kuch, Big Mac, Matthew or even Draisaitl, but McDavid is on a different tier and he’s done this for years.