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Why is there even an edge? I'm already mortal, why does my spacetime need hard limits too?? It's just cosmic baloney man.
There is no edge. Just the farthest back in time we can see because of how long light takes to reach us. It's constantly expanding not because it doesn't exist but because we can see more of the light.
I suspect we don't know as much as we think we do about the way the universe works. Once we figure out the missing info, it will unlock a lot more than just the forces at play.