Your first point cannot be debated, since we are speculating. In practice, I'vent seen a problem. It works, it's clean, and it is the right amount of engineerin

Your first point cannot be debated, since we are speculating. In practice, I'vent seen a problem. It works, it's clean, and it is the right amount of engineering needed to solve the problem. Parse and Firebase example: //someservice.js ... //works as long as both retain the same interface. provider = new FirebaseProvider; //new ParseProvider() //add: just using an if condition, the old fashioned way. getProvider: function() { if (config.provider === 'parse') return ParseProvider() else return FirebaseProvider() Why is writing configuration cleaner than doing the above? That thought process is carried over from projects with lengthy build time.