Larian is having trouble fitting Baldur’s Gate III on the Xbox Series S, the lower-priced and lower-powered console in Microsoft’s ninth-generation lineup.
I was looking up more information on why there’s such an issue getting BG3 on Xbox, and found this article with a lot more detail on the topic.
EDIT: The issue isn’t graphics or frame rate; it’s memory. The article goes into detail.
because split screen requires rendering stuff twice. and also needing to keep more stuff in memory simultaneously, depending on what two players might have in their field of view, instead of just one.
also, reducing the (subjective) quality by half, does not necessarily mean that you are now using half the resources. And also your game would look like shit compared to its contemporaries