As might have been pointed out before, Fermi's paradox only addresses the absence of expansive civilisations; it says nothing about the stay-at-homes, except to ask why, if they exist, they all stay at home.
A universe full of stay-at-homes who have formed a galactic society using long-range communications would be an interesting place to be. If communications were efficient enough vast amounts of information could be shared between systems, including all the information required to replicate individuals at long distance. You (or a good copy of you) could travel to distant alien worlds effectively a the speed of light, with no subjective time elapsed during the journey.
This may even be yet another solution to Fermi's paradox- the aliens won't arrive until we can build a device to receive them.
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