marduk
quelling chaos since 2352BC
I'm not sure that's what Randall was getting at.I remember a time when 1 megabyte of RAM was mind blowing. The next 100 years will be mind blowing... now imagine several thousand years. A galactic scale will seem microscopic to a neo-style managing civilization set up with fully automated alarm systems all over the place (the all seeing eye).
Eye see you
Energy is a lot different than computation or memory storage. Energy is finite and bounded. It would take a crapload of energy to do what you're proposing could be happening. A sizeable fraction of the energy that actually exists in the galaxy, I'd think.
And to achieve something that is far more easily achieved in other ways, I'd think, and has a very small benefit.
Think about it in an economic sense: what would the ROI be on that energy expenditure?