Running Steam in Big Picture mode on boot basically turns it into a more compatible/faster Steam Deck. I'd be more interested in installing Linux on it (being a Linux guy myself) if it wasn't for losing out on things like frame generation that you get from the Windows graphics drivers.
I've only tried framegen in one game (The Last of Us remake) and it worked fine. I also have an AMD GPU if that matters.
I think with Nvidia drivers you can get DLSS working and probably framegen too, but I wouldn't know how to set that up. Nvidia compiles both the Linux and Windows drivers using the same codebase.
Also wym by faster? Linux has less overhead than Windows does, even when using Proton, and many games perform better on Linux because of that.