I don't understand how Microsoft handle's Xbox backwards compatibility on the Series S/X, but under the hood there are clearly stubs to trampoline original expected behaviors to unsupported dialog messages.<p>Some legacy games appear to not support split-screen anymore, as far as I can tell from the store pages of specific Xbox 360-era games.<p>All-in-all, it's a subpar experience that I think will only continue to be disappointing, and the only real solution is to find used hardware and play the games in the manner they were originally designed.<p>Anything off the digital stores will be subject to alteration, sometimes just because they can, it seems.