[Retric]

The oil embargo hit the entire industry hard, but Concorde continued operation into 2003. Over time as other aircraft became more efficient the efficiency gap grew much larger but it was still profitable up to Air France Flight 4590.

[jandrese]

Concorde survived on government subsidies, especially with the R&D costs, but also the maintenance chain. It was a point of national pride for the UK and France, but also a money pit for both countries.

[mlyle]

> Concorde survived on government subsidies, especially with the R&D costs, but also the maintenance chain.

Yes, and this was mostly necessary because of the small unit counts and small number of routes, not because of fuel costs (though the latter certainly did not help.

Both could be significantly better with Boom: more routes, and lower fuel costs.