One thing I'm curious about: I haven't read the literature all that well, but my personal understanding of MWI, after trying to wrap my head around it, is that there's probably no branching or peeling at all: every possible configuration of the universe immutably exists and is associated with a complex amplitude. What does change are the amplitudes. When I make a choice at point A and the universe "splits" into B and C, the only thing that happens is that the amplitude in bucket A is split into buckets B and C. But there's no reason to think A, B and C were ever empty or will ever be empty: after all, some other state Z might pour amplitude into A at the same time A pours into B and C. We might even currently be in a steady state where the universal wavefunction is perfectly static, because every single "branch" is perfectly compensated by a "join". If so, MWI would challenge the very idea that existence is a binary predicate (it's actually a continuous complex amplitude). I'm honestly not sure how we're even supposed to reason about that thing.

Does that make any sense, or am I way off base?