Ok that's a really good explanation for why information isn't lost as a result of equilibrium, thanks.

I'm still struggling with entropy, and I still feel like nitpicking anything that comes close to "perfect equilibrium". But then again I'd argue there's no such thing as a perfect circle, and feel exactly as pedantic.

There was something I thought of relating to space expansion... if dark energy is what's at play here, and we assume our universe to be expanding at an accelerating rate, then surely this tells us a great deal about dark energy? In particular that it isn't uniform across the universe with a static energy value. It must either be decreasing in value as space expands, or non uniform (or both). For it to remain uniform and static in value, energy is being created from nothing, which is a clear violation of our laws of physics.

If we assume dark energy to be fixed in value and uniform cross the universe, and that energy cannot be created from nothing, then we must assume the universe as a whole is not expanding.

Does that make any sense?