The main issue as far as I’m aware is the banned flights over land. Unless they addressed the sonic boom problem, they haven’t really fixed anything
Discussion
Concorde used to fly subsonic to the Bristol Channel before it cranked up because of that
Maybe it's only going to go supersonic when it's over the ocean?
Maybe. I don’t see them talking about the boom in their marketing - at all.
If they only went supersonic while over the ocean, they could do NY to London probably 75% of the journey at high speed, and subsonic while over land. Similarly, they could do LA to Tokyo or LA to Sydney mostly supersonic over water, then move to subsonic for takeoff and landing.