> Especially when you make every class an interface, with... get this, one implementation! This is based on real world experience and is not a joke. And when y

> Especially when you make every class an interface, with... get this, one implementation! This is based on real world experience and is not a joke. And when you run this through a profiler, you will not notice how slow your code is, because everything is slow. Slowness is infused throughout the whole system.