>>16683730
The endgame of every civilization is a "brain in a vat" + Matrix type scenario where people get entombed in a life support device and live forever in cyberspace while robots maintain everything. (IRL) Reproduction stops, so there is no need to expand to other planets which is why we don't see massive galactic empires. We can already see the beginnings of this in our world (neets, hikis, welfare queens) so I think this is really the most logical explanation for the Fermi Paradox.