This is an interesting question, since the Akasha Chronicles are different from what is called ether, as far as experience allows to determine.
This is my personal experience and is in no way true or objective.
I think that the Akashi Chronicles is what happens after the blossoming of the sixth and seventh chakra, it gives the vision of pure light and the hearing to hear the silence, then one is able to contact the outside world, the real outside world, not a box of ego.
When this happened, one of the experiences, I had a feeling that I lived all the lives of all beings in one moment, I had visions as if I lived a completely different being, it was not about my reincarnations, it was a gnosis, expanding consciousness.
You know, in a broader concept, our soul is a likeness of the world soul and an open soul, as it evolves, can turn to the knowledge of the whole world.
Beyond the ego, there is Satan's cosmic consciousness, the absolute. As I understand it, the world as we know it exists because of Satan's intention.
So the human being, to the extent of his freedom and purity, is able to access this knowledge more directly than through words or other kinds of interpretations.
Here the observation of one's past is mere dust in comparison. But the practice of revisiting past events still happens when, for example, one purifies aspects of the soul and karma is raised for its correction and purification.