A:Answer All 4 HDMI (3 + 1 eARC) plugs on this Samsung TV are 2.1. Sony has less, so if you want all 2.1, you'll need an AV receiver to achieve that.
I have a Denon X4500H, and 2.0 is its standard. So, it's the main reason I bought S95C.
However, the one connect box...it's a different story, and a long one. Make sure you know its flaws and potential problems and be prepared to deal with them. I've had this TV for about 2 weeks now, and I am still trying to figure out the behavior patterns of this notorious one box! 3 different brands of HDMI 2.1 cable have been tested, and only 1 works so far. Even so, very often I still need to unplug and plug to get the signal back. Other than the one connect box, picture and sound are top notch.