Why MWI Is the Best Theory of QM

MWI is the best explanation of QM today, but it makes some pretty wild claims. David Deutsch answers this question in an interview with Darkish Patel. It's fairly normal for theories to start out as weak and then get stronger over time. An experiment that comes out in favor of a theory will often kill off those slowly strengthening alternatives that don't yet exist as true theories. But at the moment, it isn't all that unreasonable to keep trying to see if they can be developed into something stronger in terms of testability.