I can't quite see how it's easier or more plausible than e.g. many worlds? That one is as easy conceptually and is not without elegance. Physics has a history

I can't quite see how it's easier or more plausible than e.g. many worlds? That one is as easy conceptually and is not without elegance. Physics has a history of elegant theories that eventually turned out to be wrong. Phlogiston theory looked great at the time, and things like one-electron universe strike as beautiful when you first read about them.