People can work it out at great expense to developers and at the risk of destroying whatever a game is stylistically.
Again, each game will have its own ways of presenting, combining and displaying objects. A game with highly detailed human-like motion will be radically different from a cartoonish game. A game designed with large textures in mind will not work well with small textures. A game with complex physics will be completely different from a simpler game in how it represents, handles and combines objects. And so on, and so forth, ad infinitum.
Brushing this aside betrays how little you understand of this.
By way if example: websites are completely open systems. You can go in and see all the "assets and objects and items". Websites are also manny, many orders of magnitude less complex than a computer game.
Go ahead, copy a website's CSS and paste it into another. Or copy a chunk of a website's HTML and paste into another. Doesn't work, does it? You can reflect on why that is.
On top of all of that, why would, say, developers of Elden Ring want to allow you to bring in assets from Horizon Zero Dawn or Binding of Isaac? Those are completely different games with completely different stylistic choices.
> I understand why AAA games are so boring nowadays outside of a couple studios.
Ah yes, they are boring because you can't use skins from Fortnite in Shadow of Mordor. That's the reason.
(I haven't yet seen web3 proposed as the solution for JavaScript framework proliferation, but I'm sure it's just around the corner...)
What does it add to Halo Infinite if Deadpool is a playable character in it? Especially if the developers and publishers do not make money selling you a skin that you bought some place else.
What standard? A skin in a game is not a shitty ape jpeg that you can right-click to download. It's a 3D model designed for a specific game. Other games will not have the same models (and nor should they).
> It's not some impossible unsolvable problem unless you don't want it to work
Go and work on it then. So far you've shown exactly zero understanding of the problem. You clearly don't even understand what NFTs are.