No, I'm calling it The Great Decline. "Depression" holds out hope that it is just a temporary dip, followed by a recovery. This time, we level off permanently lower.

Permanently? Remember, forever is a very long time indeed.

Depends - is this 'experiment' controlling for population levels? I'm betting with a greatly reduced population - the way the survivors live could be quite well.

You would be more honest to call it "The End." We will not level off. We will go down, down, down, down, Rock Lobster! :)