[brigadier132]

I completely disagree.

How games work is simple. It's a simulation run at some frequency and the simulation can be affected by player input. Sometimes there is a synchronization step with a server and that is more complicated.

ECS is a pattern that results in better performance and more maintainable code. There is no reason not to use it.

[HelloNurse]

Better performance and more maintainable code are never the only concerns. For example, achieving a running prototype quickly with some ported/adapted non-ECS engine from a previous project might be more effective and efficient that starting from scratch with a better ECS architecture.