There are 11 dimensions in string theory. This is pretty much a similar view of what I've outlined above but without any need for philosophical or metaphysical questions. I suppose it's the playground argument of 'why?'....'why not' lol Is string theory real? Perhaps. Is it theoretically possible that every particle is just part of a single consciousness that wants to 'experience' itself from an almost infinite amount of different views? Perhaps. I love the fact that 'Universe' means 'one song' or 'one turn'. I hate the fact that we'll never know what any of it's for or about even if we discover it exists. Sadly as I've ventured deeper into maths and physics over the years I have become more nihilistic and disillusioned. I see a lot of physicists on youtube going the same way as their videos move over time from physics, into existential crises, and then ultimately despondency. You have to laugh
But as for the original point it is true, it's amazing how far and fast we are progressing.