I’d rather spend 40 days on a cruise ship and save some money.
IF, big IF, Airbus were to get a hypersonic airliner into service, can you just imagine the cost of the tickets! Near the end of Concorde SST service, I believe the one way ticket price was about 5 times the price of a ticket on a non-supersonic aircraft. Thus, A $2,000 one way ticket on a regular aircraft would be $10,000 on Concorde. That’s why Concorde got the reputation as the aircraft of the rich and famous. A hypersonic jet would be more expensive than Concorde.