Re: the dubious title
I suspect that Concorde was the drain into which all that aerospace R&D funding went.
But Concorde was such an audacious anomaly. If you think about it, 60,000 feet Mach 2 supercruise (no reheat) for up to 3 hours.
The military used near-space suits to operate up there just for a few minutes, yet there was this passenger plane breezing along with 90 passengers sipping champagne in shirt sleeves, and having a stroll up and down to stretch their legs and go for a pee.