Now you're talking about things past the point of intended use case. I'm not buying an Xbox branded anything to use for just my PC and Playstation. Don't be absurd. They do the same exact things aside from Xbox functionality. I have both on hand.
If all you care about is resale, then sure.
For Playstation/PC only players, getting the X model which MAY NOT work for PS5 in the future, THAT sounds absurd. We simply do not know if it's 100% impossible. Improbable, sure, impossible? We don't know. So don't buy things off hopes, and buy them on what's actually intended.