Let's get this straight: the tail didn't fall off. It was wrenched off in a violent series of maneuvers that exceeded the design ultimate load to such an extent that no aircraft in production could have withstood the forces.

Here's a quote from the NTSB's report:

The National Transportation Safety Board determines that the probable cause of this accident was the in-flight separation of the vertical stabilizer as a result of the loads beyond ultimate design that were created by the first officer’s unnecessary and excessive rudder pedal inputs. Contributing to these rudder pedal inputs were characteristics of the Airbus A300-600 rudder system design and elements of the American Airlines Advanced Aircraft Maneuvering Program.

A 747, 777 or even your beloved Saab would have ended up in exactly the same condition had it been placed in a similar aerodynamic condition.