Are you confused on why there's many different versions of Valve's Proton? The compatibility layer that runs Windows games on Linux / SteamOS and Steam Deck. Here's a little guide on what it all means.
How many software do you keep multiple versions of installed on your computer? How is it not logical to expect the newer version of something to still be able to do what it did before and more?
How many software do you keep multiple versions of installed on your computer? How is it not logical to expect the newer version of something to still be able to do what it did before and more?