Properly and fully done, to comprehend the further diversity in things. The things unified never become each other. Only, there is a common "thread" between things. To understand the connections between things. Whatever the universe is, it is a one something. So, as there is a limit to connections between things, there is a limit to the connection among things. Can't have two, or more separate universes that are one universe, however defined. Continuity balances discontinuity. The two can't happen separately, or as one thing. Sounds more like I have realized that science requires other areas of thought to properly and fully appreciate itself. That the end goal is neither science, nor anything else.
I don't know that you've heard that Einstein made many, many fundamental discoveries over many, many, areas of science. No doubt, he went his own way, apart from the scientific community, but, this was for most of his scientific career, not, just the latter part of it, as he grew older with trying to exhaust his views about the two main theories of physics. He was, in a very basic way, the "father" of also Quantum Theory, because of his attempts to disprove it. Who's to say that he wasn't right? There is work going on now that has to do with what lies beneath quantum physics. It could just be that the one is based on the other. His theories were called, Jewish physics. I suppose that goofball wasn't popularly in use, a hundred years ago. A hundred years later, people are, still, making the same childish mistakes in summarily judging new theories. Did you know that the scientific community remained intensely interested in all of Einstein's work, in all of his career? Ha, they "feared" him. He believed in one unique solution to the universe. A "just is" universe. Now most physicists still believe that there is no reason that there aren't many different versions of physics, and, laws of science. I like to pursue the notion that both notions are correct. Even that even our mistakes have existence.
Again, not everything is, purely, continuous. Were, eg, time continuous, then how could it come to any given time? You are asking the universe to do impossible feats, and, then, claiming "victory" at the result.
The universe is, still, creating itself. It's called quantum entanglement. Particles from the distant "past" making themselves known, known to us, only now. The collapsing of those quantum wave functions in our here and now.
Nobody knows. At least the scientists will admit this much.