I’ll start by making making changes so that any of the “Mandela Effect” are changed so that the “misremembered” stuff now becomes reality, and then its gonna be funny when people eventually start talking about the new Mandela Effect 2: Electric Boogaloo, then maybe I’ll switch it back after a few years, just to make the timeline more interesting. 🤭
There is a fun thing in astronomy where Neptune or Uranus was discovered by a mathematical proof rather then direct observation. 2 people had the same idea but one letter arrived a day earlier and they got credit for the discovery.
I would switch that around. It has no impact on the world at large but boy would it annoy the crap out of some people.