[fidrelity]

For anyone interested in other theories that were not mentioned and not satisfied with the unfalsifiability of Many Worlds I can recommend reading Carlo Rovelli's book Helgoland and his Relational Quantum Mechanics[0].

[0]: https://plato.stanford.edu/entries/qm-relational/

[notfed]

Copenhagen isn't any more satisfiable than Many Worlds.

They both say similar things: that the wavefunction evolves according to the Schrodinger equation. One leaves the equation intact (Many Worlds), while the other involves randomly selecting certain parts of it to be "real" or "unreal" without any explanation of how or why that choice is made (Copenhagen).

[lanstin]

https://arxiv.org/abs/2101.11052 claims to have derived an experimentally verifiable prediction from many worlds (namely that energy is only conserved in the linear progression of the wave function, and not necessarily in the "branched" or "collapsed" bit that we observe; and so in certain circumstances it might be possible to observe an interaction that fails to conserve energy.