The Empire had the best technology in existence and most inhabitants of the Empire mistakenly assumed the Empire had developed it.
In fact none of the super high tech gadgetry was developed by The Chalné or The Empire, it was all in effect stolen from other civilisations now long gone.
Why develop your own technology when you're eternal ? The Chalné was immune to the Switches when the Multiverse resets and had seen an infinite number of civilisations come and go, some with truly awesome space craft and weaponry.
He simply stole ideas and improved them by making them auto repairing and almost invulnerable.
