Anecdotal, but I've been surprised how quiet our 2022 unit is, even more so than out 2018. I can't really put my finger on it, but the rig just seems more snug inside, with less thermal loss. It's possible that the new composite floor is better at isolating the trailer. But it's noticeable to us.
As to "can you hear people talking outside 25-30 feet away in a normal voice" I'd say no, "in general", if the doors and windows are closed. Obviously there's a lot of variation on this but the interior of our ASs (we've had four) has always been amazingly quiet, as far as a travel trailer goes.
“Character is doing the right thing when nobody’s looking. There are too many people who think that the only thing that’s right is to get by, and the only thing that’s wrong is to get caught.” - J.C. Watts Jr.