I think one doesn't need to reach that complexity in order to benefit from ECS design. On the other hand, most of the games have somewhat-throwaway code, so th

I think one doesn't need to reach that complexity in order to benefit from ECS design. On the other hand, most of the games have somewhat-throwaway code, so the code design may not be so important indeed (VVVVVV was for example discussed on HN).