"Expectations were high. The entire USSR was extremely proud of the Tu-144, and the Soviet people had no doubt that it was better than Concorde. And it was so pretty!"
Both planes were clearly ahead of their time, as civil aviation had barely just transitioned from props to jets.
From what I've read, the consensus is that supersonic passenger planes were ahead of their time. What market shifts and technological improvements need to happen for the time to be right for them to reemerge? How long will it take?