I am surprised it won’t be more of a hardware improvement since the switch was released in 2017 so there has been a whole lot of new hardware to choose from since then. I would imagine there would be bigger improvements in GPU with the better Radeon offerings.
Why would you think that? Nintendo has consistently had the weakest console hardware for the last 3 generations of consoles. People buy up anything with the Nintendo brand on it, what incentive do they have to make an actually good product? They already removed themselves from competing with Sony and Microsoft in a move great for their business but abysmal for consumers.