Valve is developing a peer-to-peer Steam download system, which allows your PC to transfer game files to and from other PC’s or Steam Deck on your local network. For those with data caps, this sounds great.
Valve is seemingly working on peer-to-peer Steam downloads on LAN. pic.twitter.com/o6fXYo7gHK
— Pavel Djundik (@thexpaw) October 27, 2022
Last Steam update added some strings for this:
> This feature allows your PC to transfer game files to and from other PCs or Steam Decks on your local network, reducing your Internet traffic while downloading or updating a game
Can limit to own devices, friends, or any user.
— Pavel Djundik (@thexpaw) January 6, 2023