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I still believe that the sheer scale of space time is the reason we’ll never run into intelligent life outside of our planet. People seem to assume there is no technological barrier to super fast travel, but perhaps there is a limit? This limit could be far from the type of speed and time required to visit worlds that may harbor intelligent life.

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There is a universal limit in the speed of light. It could be considered a technological limit as well, in that no technology can likely actually be built to overcome it.

Even though there are plenty of vague handwavy theories about warp drives with exotic requirements like negative mass, the Fermi Paradox seems to suggest that no solution for FTL is practically feasible.

I’m talking about a realistic limit much closer that the speed of light. My point being, that perhaps there is an even closer limit that it hard if not impossible to overcome for an intelligent life that’s contained in a biological vessel. Given how things in space are measured in light years, perhaps the time it takes to traverse these spaces far exceeds any biological lifespan. Put it bluntly - everyone could be moving at each other, but given the distance apart they would still die off before meeting one another, because of the time differences involved.

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