Best part of elden ring was when I updated it and the game forgot it doesn't support ultrawide for a good 3mins giving me false hope before it remembered to draw the black bars on the side.

I don't see why games cannot be updated to use a dynamically scaling bounding box for UI.

In the past, games used to already have this for overscan protection. The user was able to move and scale the UI slightly to correct for it and the UI would scale properly based on that setting. Nowadays, they would need to add an achor property to UI elements to say which corner of the screen to follow, so I understand it may be a lot of work to update existing games, but in many game engines this is already a 1-click option.

Elden Ring also does not have cross platform multiplayer. The option about crossplay in the options controls whether or not you are matched with everyone in the world or just your local region.