Thus I think "Concorde moment" is really misnomer. A technological solution is always a balance, and if your balance tips the wrong way, your solution sucks. That's the hard reality of what engineers have to deal with.
The way I see it: there is simply not enough wealth accumulated to keep these flights running. Perhaps in a future world were aviation kerosene is cheaper, engines more efficient, and airframe and power plant maintenance more heavily automated, we'll see a revival of supersonic transportation. Until then, I'd rather airlines not bleed money keeping these planes flying. One might get teary-eye'd over the shuttering of the program, but more efficient allocation of resources is a real cause for celebration!
The notion of "'progress' at all costs" is an insane one.