See my edit above.

Also, check out this video. It has a lot of side-by-side comparisons of SM64 and Odyssey.

The developers wouldn't argue it isn't treading the same ground. In some cases, they literally have you tread the same ground. They send you back to Peach's castle, just like we're back in SM64. They know they're running off of nostalgia.

Every game repeats stuff from older games. The 3D Super Mario games do this more than most. Call of Duty has changed more than these games have.

I can't think of another series that repeats the same things, tell you explicitly as part of the game that it's repeating the same things, and then has fans argue it isn't repeating things again. Of course it is. We all know if is, and that's part of why it sells. There's so much nostalgia bait because they know the nostalgia is what sells a lot of their games.

I haven't owned a Nintendo console since the SNES, but I've played a bit of SM64, a good chunk of Sunshine, and most of Odyssey (all when they were new, not since). I can tell how much they all share and I'm not even a fan of the games. An honest fan would agree.