this is vaguely related to the string theory related post from a day or two ago, it's all bazinga science folks TL;DW string theory is a big thing because people that read pop science really liked it and it took a long time for physicists to come out in force and say "this is untestable garbage"
Theories depending on ever-more universes which cannot be observed at all by us are massively inelegant compared to ones with just our universe.