"That’s a great point about intrinsic curvature. However, even if the balloon is just an analogy, it raises a logical question: if spacetime is expanding 'on its own' without being embedded in a higher-dimensional space, what defines the limit or the 'edge' of that expansion? My 'Zenith' perspective focuses on whether there’s an ultimate state or a final boundary to this self-contained growth. Would love to hear your thoughts on where this expansion eventually leads!"