i simultaneously agree and disagree with you
i agree because i don't think i've ever seen any game that achieved the level of visuals this game has in all of gaming. i've heard the phrase "a living" or "an interactive" cartoon for decades now. particularly back in the early 00s when stuff like cel shading started becoming popular. i never agreed with that description, and most cel shaded games disappointed me greatly on that end. one of the problems was that the characters always seemed out of place in their world. i don't mean the environments didn't match the character art style or anything, but rather, the characters always seemed obviously like they were superimposed on top their environments. they never felt naturally a part of them. they never felt organic. even what i consider probably the best looking cel shaded game, zelda: wind waker, did not fully achieve that result, as tremendously impressed as i still wound up being at the time.
cuphead however, succeeded where all other previous games failed. everything about the game's visuals feels completely organic. the character blend in PERFECTLY (or as perfectly as any game developer thus far can get) with their backgrounds and environments. this is a game that legitimately feels like it's earned the right to call itself an interactive cartoon. i always figured such a thing wasn't possible, otherwise i assumed we'd have dozens of games that could do something similar by now. i have no idea what graphical sorcery these guys did but musta been a tremendous undertaking.
all that being said, i disagree with the statement, only for personal reasons, that being that i never actually liked that 30s silent era betty boop/steamboat mickey style animation. the only exception was the early max fleishcer popeye cartoons and that was only cause i liked popeye specifically, not the animation style.