It mostly revolves around the idea of collapse. There’s no expermental evidence for a collapse. In the MWI, there’s no collapse. If we find evidence for a collapse someday, we will have to discard the MWI. However, people have been looking for a while now—and there’s no sign of a collapse so far. So, applying Occam’s razor, you get the MWI—or something similar.
It mostly revolves around the idea of collapse. There’s no expermental evidence for a collapse. In the MWI, there’s no collapse. If we find evidence for a collapse someday, we will have to discard the MWI. However, people have been looking for a while now—and there’s no sign of a collapse so far. So, applying Occam’s razor, you get the MWI—or something similar.