Concorde's presence today has more to do with the short sightedness of the worlds' governments at the time it first started flying.
The fact that Concorde is still flying is because it remains the only supersonic airliner in existence.
If the majority of the world hadn't sulked because England and France had stolen the march on supersonic travel, then I have no doubt that there would have been a modern replacement by now.
If it had been more readily accepted, then the technology could have been developed to meet today's more rigorous environmental and financial considerations. We might all have been travelling supersonic by now, but as usual politics overrules common sense every time!
It's difficult not to get sentimental about an aircraft that could have transformed air travel 26 years ago.
'Nough said.