MWI is just the unitary, deterministic, local, continuous, linear evolution of a partial differential equation.  There&#x27;s no extra semantics that need to be added to tell you how to interpret it.<p>It&#x27;s the only interpretation of quantum mechanics that has all of these properties.  Others fail most of those qualifications.  I&#x27;m particularly bothered by the thought that we don&#x27;t live in a deterministic universe.  This is what I mean by &quot;more elegant&quot;.<p>As for whether our universe is a simulation, I&#x27;m familiar with Bostrom&#x27;s argument, which you outlined.  It&#x27;s certainly an interesting idea and might be correct, but orthogonal to the original question of interpretations of quantum mechanics.