I think WHAT NEXT needs to appreciate that if you are unstable by the prescribed point, then the landing may be in jeopardy. Hence a G/A is the normal SOP, as landing well past the touchdown zone negates the landing performance calculation.
Some might say that it really depends just where on the unstable spectrum you find yourself.
Accident reports are full of over runs.
So for a light aircraft it could by 200ft AGL: B737-800 (MLW 66+MT) ~500ft AGL
Heavy by 1000ft AGL.
Judgement call as ever.
As for the engine failure on final, it takes most 737-800 students three attempts to perfect the technique in the simulator.