Believe me, I would love to have flown on one. I know a couple of guys who did, and it sounded really cool. But if the economic case doesn't close, then the only way they get sold is as toys for rich people, hoping to eventually trickle down to us mere mortals. Eventually. Maybe.
1: This is why after the crash AF decided to retire the Concorde, and going from having to pay half of the maintenance facility upkeep to paying all of it pushed BA from small profit into the red, hence BA following AF into retirement.
2: Which were high! Back as a teen in the 1990's I looked into it, hoping to talk my parents into flying one for a translant we were doing, and the cheapest ticket on a Concorde was like 3x more expensive than even 1st class on a 747. We flew steerage on a 747 instead.
I think US West Coast/East Asia city pairs would be the real killer app for passenger supersonic, if aircraft range permits.
On a Dreamliner with modern entertainment, higher cabin pressure, satellite internet, big windows, far better seats and much, much quieter engines? Meh, NBD.