We don't need a cache site, but to be able to have a shared content addressed storage. I wish a single technology is developed for this, and then I don't mind

We don't need a cache site, but to be able to have a shared content addressed storage. I wish a single technology is developed for this, and then I don't mind if privates sites act as peers, I'd love to be able to share games I downloaded or videos I recently saw locally. It took Steam like 20yr to support sharing on the local network (with Google/Facebook/Netflix with no sharing in sight). I think that's insane and shows that hardware has been improving too fast in some sense.