The problem is there's no way to measure it in actuality. If there's not enough energy in the universe to make the measurement, then there's no making the meas

The problem is there's no way to measure it in actuality. If there's not enough energy in the universe to make the measurement, then there's no making the measurement no matter the theory of what would happen if there were more energy. We could discuss the theory of what happens to a virtual photon going down a split path between Everett or another interpretation, but if we can't ever actually measure the virtual photon, then it's just theorizing around an unanswerable question. Which is part of what leads to "shut up and calculate."