Switch 2 isn't the same as Switch 1. It'd have different screen size, different battery size, different heat distributions - they absolutely have to rearchitect
Steam Deck developer Pierre-Lou Griffais: I think people are looking at things like an incremental version and assume that it’s an easy drop-in. But in reality, the screen’s at the core of the device. Everything is anchored to it. Basically everything is architected around everything when you’re talking about a device that small.
“I think it would be a bigger amount of work than people are assuming it would be,” he stated, adding: “I don’t think we’re discounting anything. But the idea that you could just swap in a new screen and be done – it would need more than that to be doable.”
If the Steam Deck developer rejects the notion that something is "easy", than he is implictly saying that it is "harder". Now, maybe you maintain that it is not harder, but an "equal" amount of effort but in a different direction. In which case, what are you saying you want Nintendo to do? Architect 2 entirely different solutions out of the gate, one for OLED and one for LCD?
I'll trust the words of the actual Steam Deck developer, thanks.