[debacle]

OO doesn't matter if you want to simulate 100k objects at once without slowdowns.

[berkut]

ECS on its own doesn't always help - it's not a magic bullet for every situation: sometimes you need to use spatially-aware data structures / acceleration structures for those type of "queries", and vanilla ECS (i.e. similar to a DB in terms of queries) doesn't always help you in these type of situations.

[Mikeb85]

And how many games actually do that?

Also, if you really want, with Godot you can bypass the scene node system and also just use C++.