poke: "The reason most physicists working in the foundations of quantum mechanics don't believe in many-worlds is because they take a different view of one or more of the assumptions you made"

I think the more fundamental reason most physicists working in the foundations of quantum mechanics don't believe in many-worlds is that those who do believe in many worlds consider the foundations problem to be solved, and see no need to work on it anymore.

poke: "The reason most physicists working in the foundations of quantum mechanics don't believe in many-worlds is because they take a different view of one or more of the assumptions you made"

I think the more fundamental reason most physicists working in the foundations of quantum mechanics don't believe in many-worlds is that those who do believe in many worlds consider the foundations problem to be solved, and see no need to work on it anymore.