Only thing which might be of value could be the ability to jettison a burning engine, leaving the rest of the aircraft intact
You sort of have that - the engines are fixed to the airframe with low melting-point pins. In the event of a (serious) fire, the pins melt and the engine falls off.
I expect in reality even that would be of minimal use
ISTR an aircraft dropping an engine over Schiphol about 20 years ago. It didn't end well...