Ok so there is a french developper who works for portage of Xbox and Switch's games who talked about all these : https://www.youtube.com/live/2JupUp-2M3k?si=48TNUarjnDrubwJD&t=3976
He was a bit harsh but basically he was saying not to believe in a "magic" technology. On the "transitions" kits for the new Switch, the power was that of an Xbox One. Beware of hype, it can be damaging in the end.
But he added that this remained his opinion. He repeated it several times.
On another topic they talk about how Apple could create a great hardware in this category if you are interested (and if you understand french).