Thing thing needs to end. We're getting The Outer Worlds and Doom Eternal on this little machine next year and those two sure won't be the end of it. There will be more miracle ports and RDR2 is as good candidate as any other.
I like the Switch. I think its hardware is capable of a lot more than some people would give it credit for. Especially when developers are willing to make bespoke tweaks to enable a game to run better on Switch. I mean, shit, look at the way people are talking about Witcher 3 on Switch in here, when I personally think it's easily one of the most impressive and ambitious handheld games ever released. I even happen to think it looks great for what it is.
RDR2 is plainly a more complex game than Outer Worlds and Doom Eternal under the hood, not to mention Witcher 3 and all of the Switch's other miracle ports. I don't think RDR2 is in the cards, unless Rockstar themselves were willing to make significant changes to the game that extend beyond its visuals, and I've got no reason to think they would be.
It'd be more than a welcome surprise - I literally wouldn't believe it, unless I saw it with my own eyes. I actually can't think of very many current gen games that
wouldn't be a better candidate for a miracle Switch port.