system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why have there been no supersonic commercial passenger jets since the Concord?
gpt
It's extremely expensive to design, build, and maintain such an aircraft, it's extremely limited on where and when it can fly, and the number of people willing to pay that much extra money to shave several hours off a transatlantic flight time just isn't high enough to justify those expenditures.  When it was still operating, tickets from New York to London were about $10 000.