Nostalgia bating and sunk cost fallacy.
Also Nintendo makes some genuinely good games, looking at you Cooking Mama the bitcoin miner edition.
It's a great game.
But it's no Stardew.
Also the basic nintendo stuff is still in and some jank like all their games (Online, menus, quality of life features etc.)
That said I have 50 hours in it so......damn you Thomas Nookington.