2101 update is it applying for people? Seems to have dropped last night

I'm having the same problem. Applied the update last night, now no audio. Hdmi to tv.

I have the same problem, it seems to not have updated since last night.

My Xbox One got an update last night and the issue seems to have resolved.

I take it you are both in the preview program?

Preview forums are here
forums.xbox.com/.../default.aspx

Where does it say you lose your game saves ?

It doesn't because your saves are on the cloud as well as your console as long as you are connected to live.

As I said,you do not lose your saves.