No, i disagree. The reasons Concorde got retired are several.
It was old, noone does or did make parts for it anymore, so all parts were recovered from scrapped concordes, making time and resource hungry to maintain. It was pretty environmentally unfriendly, with the noise and the amounts of fuel it burned/leaked. It was HUGELY fuel hungry which meant that ticket prices had to be very high, and these days with video conferencing, email etc, there were very few people willing to pay full whack for the speed of a concorde trip. I mean, a concorde ticket to NY could be �7K. Which is about the same as a FIRST class ticket to Singapore. Now imagine needing to sell about 80 seats like that on EVERY flight, as compared to 14 FIRST class seats like on a 747.
Impossible in these days.
Yes, you could have filled the plane with day trippers and interested people if you could have sold it at �500. But at that price it would cost the airline millions of pounds to operate, so no business would do that.