Proper way of pausing gameplay and physics

I was wondering what the "proper/recommended" way of pausing an ECS based game (with physics) is. Currently I'm just fetching my own

SimulationSystem(Group)s

and the

StepPhysicsWorld

and toggle their

Enabled

flags (as well as the good old

timeScale = 0

). It works like I want to, but I was wondering if I should instead pause the entirety of all SimulationGroups?

Code (CSharp):

1. public void OnPauseButtonClicked() { // A button on a canvas
2.    var gameSimulationSystemGroup = World.DefaultGameObjectInjectionWorld.GetExistingSystem<GameSimulationSystemGroup>();
3.    var lateGameSimulationSystemGroup = World.DefaultGameObjectInjectionWorld.GetExistingSystem<LateGameSimulationSystemGroup>();
4.    var stepPhysicsWorld = World.DefaultGameObjectInjectionWorld.GetExistingSystem<StepPhysicsWorld>();
5.  
6.    var enabledPrevious = gameSimulationSystemGroup.Enabled;
7.    var enabledNow = !enabledPrevious;
8.  
9.    gameSimulationSystemGroup.Enabled = enabledNow;
10.    lateGameSimulationSystemGroup.Enabled = enabledNow;
11.    stepPhysicsWorld.Enabled = enabledNow;
12.    Time.timeScale = enabledNow ? 1 : 0;
13. }