Before unreason took over physics, one of the major principles was energy conservation. However, this was before. Now Sean Carroll, following other Multiversists (as I call them insolently) crucially depend upon nonconservation of energy.
Sean wrote an article, short and to the point: “Energy is not conserved.”
Well written, indeed. Carroll glibly asserts that “see, it was not so hard” (to throw away the most fundamental principle of physics, energy conservation).