Comment by rtoway

Bevy, while an ECS based library, can easily be used to program a game in a more traditional way (excuse my formatting):

struct Player { health: Health, }

  // ECS style
  fn update_player(query: Query<&mut Player>) {
    
  }

  // Traditional "OOP" style
  impl Component for Player {
        fn update() {
        
        }
   }