Finally, after 10 months, I am able to save and load my game world!  Prior to this, every day, every time I ran the game, the game world had to be generated on the fly.  Even when I was doing live demos at conferences and twitch.  I suppose the nice side benefit of this <strike>bug</strike> undocumented feature is that my world generation AI is rock solid and fast; it’s probably been tested 10,000 times. :-)