Were you not alive in 2013 when the first SteamOS released?
I was and I'm fairly confident it was never marketed as an "OS for everything", not 10 years ago, not today, and not anywhere in between, but I'm open to being proven wrong.
I did not forget what I said, it is not "obvious af", I am not trolling, and I understand English. I didn't say anything that related to or contradicted your statement. Would you care to explain or will you just continue insulting me?