I think the gaps in theory need to be addressed first. A theory that correctly bridges the gap should also shed light on why the situation today is this way. Wh

I think the gaps in theory need to be addressed first. A theory that correctly bridges the gap should also shed light on why the situation today is this way. What if QM and relativity are both correct in the context we view them? What if higher energy isn't what's needed to reconcile them? Einstein "simply" took the observation that the speed of light is constant in all reference frames, and relativity followed from that. Granted, he had to throw out the idea that time is constant. So what assumption might we take for granted that needs to be thrown out? Or more specifically what is the core set of things that conflict between QM and relativity? I'm asking for something far more specific that "QM and relativity can't both be right". It's in details that are probably way beyond my understanding.