I do wish people would stop fussing about this. On a four engine aircraft, if the engine failure is 'benign' and there are no other problems, it is no big deal. Of course one has to consider en-route alternates differently and calculate the various options in case of a further failure but, if done correctly, the whole operation is perfectly safe.
If I remember correctly, BA landed short of LHR (Stansted?) with just 9,000# of fuel. I wonder how much fuel the 380 had when it had to land at Kuwait, just up the Gulf from Dubai?