One example: The way Bethesda games track an enormous number of physics enabled objects across their open worlds. I feel like most games in the last 10 years have made a point of simplifying their physics systems to a point of near-nonexistence.
Bethesda knows that when I dump 500 wheels of cheese on the floor of my house in Whiterun, I want it all to still be exactly where I left it when I come back 20 hours later.