I am not saying the players of previous eras would be bad now. I never made that argument. I agree that Coffey would be great today - he would be Makar/Hughes+. I agree Gretzky would be dominant today.
I am simply saying that Connor is an all-time talent just like those guys you are describing, and would have been just as good in those eras. For soem reaosn, you seem to think that MacInnis/Gretzky/Coffey would destroy today's NHL, but that 1990s McDavid would suddenly be pedestrian because his skating talent would be nullified by *checks notes * hot dogs?
Honestly just kind of ridiculous. Phil Kessel ate hot dogs his entire career and was still one of the fastest players in the NHL. These things matter to some degree, but they do not matter for the absolute best talents that the world has ever seen, which McDavid is. I agree that Gretzky/Lemieux/etc are those talents. I am saying that McDavid is also one of those talents, and it's pure nostalgia to pretend like he isn't.
No, it isn't. His actual speed might not be faster, but his ability to play with the puck at that speed is MUCH better than anyone in history, by a massive, massive margin. Fact. Obviously the raw speed isn't the only feature of his game, otherwise Michael Grabner would have been the next Pavel Bure and Dylan Larkin would be just as good as McDavid. Didn't think I had to spell that out.
No, the difference is not about hooking and holding. Again, looks like you don't watch him play at all. Guys are constantly trying to hook and hold him and simply cannot make a connection because he is moving too quickly with the puck.