Our Terrible Version Control Habits Almost Deleted Everything

This week on Probably Unlimited Games: Matt tried to optimize grass, lost 60-80 FPS in the process, and then briefly panicked thinking he'd deleted an entire month of building work. Spoiler: the mansion survived, our version control practices did not.
We learned that high-density grass murders your framerate, static bushes look weird next to everything else that moves, and apparently we need a refresher course on how to use Diversion properly. Also, my mansion has stairs you can't actually walk up without bonking your head, so maybe losing it wouldn't have been the worst thing.