You could also just pretend there's a global catastrophe. Stop using electricity and tap water. Stop doing anything that requires you to interact with people as normal. Instead, drink from ditches and hunt rats for food. Live in a cardboard box. Eat a car battery to simulate poisoning from whatever imaginary disaster you're trying to survive. If someone comes to talk to you, assume they're a cannibal and run away. If you wake up in a hospital, pretend you're in a prison camp and don't speak the language. There's nothing actually forcing you to take advantage of all the good things society has made.
I would say there have been some interesting developments during the last twenty years. The internet has becoming mainstream, for instance. Man, remember what the internet was like back in 1990? I certainly don't. And the mobile telephones? I did a quick search for pictures, and found
these little bricklets from 1991. Cheaper and cheaper lithium-ion batteries have also made things like ten-euro RC helicopters possible. And speaking of euros, the European Monetary Union happened. I think the world is doing just fine without an ongoing global war.