Along the idea of streamlining and reducing the mental overhead of actually playing a game - it's great to have my entire library in one place. I refused to use any of the other launchers because I don't want to have to hunt down accounts in 5 years when I get a taste for nostalgia from a game that I don't own on Steam.

Untitled Goose Game got me back into piracy after 15 years of abstinence because of the anti-Steam launch. I would have gladly paid were it on Steam.