I remember when Concorde entered service the feeling was "yes, it's only 100 seats, it's noisy (from the outside), it's expensive to fly on, range of only just over 4,000 miles but it's amazing. A couple of SST generations down the line from this, UK to Spain will be an hour, Australia a handful of hours. Everyone will fly supersonic. It's the future".
Unfortunately it didn't happen and in the second half of the second decade of the 21st century it takes as long to get to New York as it did in the 1950s.
Between 1976 and 2003 it took 3 hours.