I don’t want to have to go to a website and download every update manually. I want my saves synced between my PC and steam deck, I want achievements, I want to

I don’t want to have to go to a website and download every update manually. I want my saves synced between my PC and steam deck, I want achievements, I want to invite people from my friends list to games. There’s such a massive list of things the steam client does that makes the experience better.