[canjobear]

Later observations proved Bruno's speculations to be correct.

But MWI does not make different predictions from other quantum interpretations. No observations can confirm or falsify it.

[baddox]

Modern cosmology by definition doesn’t make different predictions than saying “cosmological models mention things like stars and galaxies, and those models fit our observations, but those stars and galaxies aren’t technically real.”

[Konohamaru]

Maybe in the greater context of our universe cosmic pluralism is a design pattern, which would make MWI a more preferred interpretation.