"We're looking at the tech on that right now, and we're still evaluating that. We stream everything, and we're just looking… because everything is open, everything's available, so there's no level loads. We are looking at that now, but we don't know."
https://variety.com/2018/gaming/news/quakecon-rage-2-interview-1202902688/
If the game sells well and Bethesda great support for Switch already, I wouldn't be shocked if it does eventually come to Switch.