I really don't understand that comment. We had the Concorde, didn't we? We found out that the marginal costs are not worth the 2h saved, fair enough, but there

I really don't understand that comment. We had the Concorde, didn't we? We found out that the marginal costs are not worth the 2h saved, fair enough, but there was a race towards faster. And I believe there are companies developing supersonic planes today again, maybe at lower marginal costs. OP did not say the efforts will be successful, OP said there will be a race to see if it is possible to drive costs down spurred by increased demand.