This means you can't pass the game around to your friends or sell it afterwards, which completely ruins the purpose of physical media imo. I mostly play PC these days so this doesn't affect me, but it's a disappointing direction for console games. At least they could've used an empty disc that has proof of ownership.
Now that I have a Steam Deck I just don't see me ever owning another console or even gaming PC. It has one of the main advantages of consoles (a single hardware profile to support) and it's light years ahead. I have yet to find anything I want to play that I can't play.
It does. But any decent USB C hub will work too. It's a PC! The main downside compared to the Switch, is that the transition between handheld and TV isn't as smooth, due to the different screen aspect ratio (Steam Deck is 16:10, most TVs are 16:9). From my own experience, I usually have to restart the game for it to fill the screen properly.