We don't talk much any more.
Remember what Morpheus told Neo in that old Hollywood adaptation, "Let me tell you why you are here. You have come because you know something. What you know you can't explain but you feel it. You've felt it your whole life, felt that something is wrong with the world. You don't know what, but it's there like a splinter in your mind, driving you mad. It is this feeling that brought you to me. Do you know what I'm talking about?" Morpheus 1998.
It seems that consciousness (mine or yours) is still the ultimate reality frontier that Jim introduced to us. For now, this is the only place you will see the above equation in this exact form. This form of Einstein's equation replaces the "invariant mass" with a "multiverse rest mass." In the very near future, science will show that when there is an inertial system and a reference system of particles moving in different directions, the invariant mass of the system is the analog of the rest mass, and the multiverse rest mass is the only mass that can ultimately remain the same for all observers, even those in relative motion. Like Neo (in our forum not the movie) always says, "there is no spoon."