The FAA warned about the danger posed by the vulnerability of Concorde’s fuel tanks to lower wing damage. The rest is history, after the disaster extensive modifications were required before the type returned to service.
Hopefully, Airbus won’t push the A321 any further than the XLR and make the same mistake as Boeing did with the MAX. After 30+ years they’ve got their money’s worth and it’s time for a new design if they want more capability.