Yes, but a modern CAD program can make the design faster (to design) and cheaper. Turbofans with high bypass ratios are more efficient than the engines the Conc

Yes, but a modern CAD program can make the design faster (to design) and cheaper. Turbofans with high bypass ratios are more efficient than the engines the Concorde used. Of course it would be less efficient than a subsonic jet, but they never claimed the opposite - the idea was for it to be faster, but not (much) more expensive than today's business class on subsonic jets.