Really how many people would carry a Series X disk to 'their friends house who has only an Xbox One', sit there for half an hour waiting for the game to install on XB1's old HDD, and play it with the friend together? What year is it, 2005? Online multiplayer/co-op is a thing. There's virtually no value for most in the scenario you explained.
The problem with Xbox is 'services' always used as an argument instead of great games. Smart delivery and Gamepass is not a substitute for FF7R, Death Stranding, TLOU2 and GoT in just the last 5 months on Playstation.
I'm not going to address this again after this because I've explained it inside-out and in the simplest of terms, yet I keep getting replies that simply refuse to absorb it. It's exhausting and, obviously, utterly pointless.
So, one more time, just for you.
It isn't like the discovery of penicillin. It's a new twist that allows extra freedom to play your owned games on the whatever Xbox hardware you have access to at the time.
You can do it with a disc, take it to a friend's house (it's not compulsory, don't worry). You can also do it digitally and it may be that you buy the Series X version and want to play it on your old One X that you've moved to the bedroom. I used the disc example because, very clearly, I need to keep it simple and people want to insist that Smart delivery is exactly the same as the current 'upgrade patch' system, which it clearly is not.
You wouldn't be able to do it with Cyberpunk on the PS5/PS4, though you'll be able to do it with Cyberpunk on the Series X/Xbox.
It isn't a world changer but it's new and it's a nice
extra feature.
I don't understand why people have a burning need to explain that an improved feature is bad, a lie or unnecessary. Some people who claim not to care about it are very adamant that it doesn't even
exist.
It's like a fever dream.