The issue with that is, people have no idea what these “choice” even mean. SteamOS is SteamOS, Windows 11 is Windows 11, MacOS is MacOS, but Linux is a big list. If pushing adoption is the key purpose, the manufacturer need to pick one that they believe is reliable and in active development. Just one. All these editions will very likely cause choice paralysis, which lead to people deem it as “too complicated”.

Also Valve will not likely go that path again.