If many different versions of you existing bothers you, does Schroedinger's cat bother you?
The extent to which MWI is a stronger claim than "no collapse," it's purely interpretative. It certainly doesn't posit any "splitting" beyond vanilla QM. Questions about conservation of energy suggest that you don't get this.
Eliezer Yudkowsky and Scott Aaronson - Percontations: Artificial Intelligence and Quantum Mechanics
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