I doubt you were measuring. You seem to be classifying only by features you care about, a common flaw when doing physics.
"Nearby everett branches" means universes in similar quantum states to ours. Everyone (recently) dead but in the exact same place is a much nearer branch than everyone alive but 1 cm to the left.
I was kinda measuring. My estimate was that given random flips in quantum states (many), it would be easiest (take order of magnitude fewer quantum flips) to change Job's decision, somewhat harder to change the type of his cancer or toggle whether he had cancer (for example, by changing the stochastic cell changes that led to his cancer) and require such completely different universes to change his type of cancer that it isn't even clear whether he could be considered Steve Jobs anymore.
Another way of looking at it is with subsets of universes. Consider th...
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