On a non-google level just being aware of code sitting around costing resources is pretty important. Often, tests and maintenance are just ignored or not calcul

On a non-google level just being aware of code sitting around costing resources is pretty important. Often, tests and maintenance are just ignored or not calculated in as cost (be it time, money, effort or otherwise). It is almost in the same realm as "I don't know why it works" which is as dangerous as "I don't know why it doesn't work".