There are distributions with a great Steam experience out of the box? It’s SteamOS actually a good choice? Maybe isn’t what you use or prefer.
A good Steam distro for me has a very mininal procedure for perfectly working controllers, client and general user experience.
Your direct test and experience are very appreciated.
I use Ubuntu for my gaming PC. I use it like a PS5 or XBox- I turn the PC on, it auto logs in, auto runs Steam in Big Picture Mode. I use my Xbox controller to select and launch the games I play. I really have not turned on my PS5 in months. And games I was considering buying for the PS5, I will get for my Linux PC. I even add non steam games to my Steam library and play them with Proton/steam.
Currently playing Baldur’s Gate 3 and Lords of the Fallen. Both on maxed settings. Looks and plays great.
Steam has really helped Linux gaming become easy.