It would be too much work to weed through the historical player cards to see which comparisons and predictions panned out and which didn't, and to come to some conclusion about the usefulness of that particular tool.
I do think he is a smart guy and knows a lot about hockey and statistics though. I've seen him on podcast and stuff, and he always seems to be cool and knowledgeable, and acknowledges that there are other factors (eye test and character) that lead to a player being successful (or not), which can't be reflected in his model. He seems pretty humble about it.
Keep in mind that the player card comparisons on Twitter is mostly just click bait material to advertise his services, which if you believe the testimonials, people working in the NHL have used in the past.
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"A pessimist thinks things can't get any worse. An optimist knows they can."
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