Right, any “global destruction” where nothing is left is compatible with the Fermi paradox. The exact nature of destruction does not matter, only that it’s sufficiently total.
Another route would be evolution of super entities into something we can’t detect (even by the traces of their activity). That’s also compatible with the Fermi paradox (although the choice to avoid big astroengineering and to go for different and more stealthy routes is interesting).
It is compatible with the Fermi paradox, and you’ve identified one variation. Another one would be an AI that creates a black hole for some reason.
Right, any “global destruction” where nothing is left is compatible with the Fermi paradox. The exact nature of destruction does not matter, only that it’s sufficiently total.
Another route would be evolution of super entities into something we can’t detect (even by the traces of their activity). That’s also compatible with the Fermi paradox (although the choice to avoid big astroengineering and to go for different and more stealthy routes is interesting).