YAGNI might lead to PrematureOptimization:
Yagn those two bytes, so lets celebrate; we saved space

The short answer by RonJeffries:

	 :	No, it can't do that. A rule which prohibits work can't be used to justify optimization.

Whow! Quite a bold assertion! Even given the FirstRuleOfOptimization? --MarcGirod

''YouAintGonnaNeedIt only applies to functionality, not to memory consumption. YouAintGonnaNeedToOptimize...''

Factored away from YouArentGonnaNeedItAndYtwok