Weren't these events every two years? It was the only way to try new playstyles, meet new people, and experience different economies. We cannot count the 2019 merge as one because the decisions were made for us, we had no say in which world to choose.
Me at a personal level I want those with large egoes because they feel they're the best in a small world to get crushed or at least not be stuck with people like that.
Thank you for reading an hope it is implemented, frequent world leaps would definitely help us better discover what/who we want to be with.