You don't cover edge cases mainly by writing specific code for everything and adding on to the existing load. You do it mainly by creating an elegant single sol

You don't cover edge cases mainly by writing specific code for everything and adding on to the existing load. You do it mainly by creating an elegant single solution that covers all cases. Every line of code and every technical layer you add makes you susceptible to even more bugs and edge cases. And just because the airline industry does software backwards, doesn't mean that you should do so.