Sirrandalot (you know - the guy who created a camera INSIDE Blender before) dives into simulating dynamic systems using simulation nodes. Starting off with Coway's Game of Life, he continues to implement non-grid systems, aging, multiple plant types, moving creatures and dynamic island generation. It's both highly interesting and quite insane, and I'm impressed the geometry nodes didn't break!
If you need to decompress for a little after all that, I can't blame you. Just zone out and watch a day in this virtual world, with creatures scurrying by and nibbling at digital plants: