There isn't really a reason for keeping them on Active that's just what I ended up doing while I was testing for the tutorial. I haven't experimented if keeping it on Active increases the bake time or not. For this scene I doubt it would make much of a different but for more intensive simulating it would probably be good to switch it to Passive if it does help with faster processing. Same with the collision shapes I just didn't really think about changing them. But it would probably be good to help speed up bake time.

@@BlenderMadeEasy For the collision shapes, maybe they do not save much baking time, but they surely are sometimes helping to get more accurate simulations. That's what I like about the new "Compound Parent" shape option, I never made better (more stable) chain animations before. But with the passive/active thing I was also thinking about in terms of making tutorials about simulations, I guess people would benefit from it and learn even more (although you have enough good information for beginners in your videos of course 🙂) , because some think a passive object would only be there so that active objects react to it, and then wonder why interaction does not work when they animate them. I think for beginners this behaviour is a bit unintuitive. When active rigid bodies have animation keyframes, they are not using them if "Animated" is not enabled. So far, so clear, one would make an animation, maybe wonder why the object is not animated and just falls down and then realize, oh I forgot to check that option. But the passive objects, if you animate them with keyframes, this works instantly, since they are passive and do not react to physics like gravity etc. They seem like collision objects for other simulations. But now - other than collision objects - they do not interact with the active rigid bodies. Because therefore Animated has to be enabled as well... I understand why, but as I said maybe beginners do not and since the animation is working without, it is not obvious that this the thing that is missing.