You aren't gonna need it
Или Always implement things when you actually need them, never when you just foresee that you need them
YAGNI vs KISS
YAGNI фокусируется на удалении лишнего функционала и логики, а KISS — на сложности
2.4.4.3 KISS Theme | Back To iOSWiki Contents | 2.4.4.5 SOLID Folder