Recently got inside the Concorde used for testing, now at Duxford. That plane is much cozier than I thought, even with no seats. And the number of fuses is slightly crazy.
The example at the Museum of Flight in Seattle (somewhat ironically resting at a Boeing factory...) still has original seating and the interior is open to the public - it's really cramped. What got me most though is the tiny portal of a window you got, due to the design constraints of supersonic flight etc. All that cost and prestige, but a cramped seat and no view.
Honestly, if I'm spending that much money for a ticket, I'd prefer luxury over speed. I don't know how many people would prefer a cramped supersonic aircraft over a trip that takes slightly longer and gives you a lay-down bed.
