So in Fermi Paradox, I assume the number of lines of independent material evolution that have reached the singluarity to be about 100 million but this would range from those like ourselves who have just and those who did some time ago, judged by absolute time since the cosmic singularity, and are therefore advanced on scales such as that of Kardashev.
Once we are no longer concerned about the life there a reevaluation of the Drake equation causes the next to last two parameters to drop out and the last to be taken as 1 billion years for the time a world would have been able to support life giving:
- N = 7 × 0.5 × 2 × 0.33 × 10 9 = roughly a billion worlds
as the amount of real estate for development in a galaxy such as ours. This figure can be fudged in a number of ways by observing current estimates of the ancientness of life on earth, terraforming by advanced cultures, and the know state of planets in our neighborhood such as Gliese.
Thus the overall picture is of a dense cosmic culture and a no less crowded one at the local galactic level.
Assuming physics as we know it is correct in so far as it goes and actual travel is prohibitively expensive (by virtual of the effects of time dilation if nothing else) then the cosmic culture and economy would be ones of cooperation and empathy in a manner unfamiliar to us but the local galactic cultures or at least intrasectorial ones would be intermediate between what we know and the rule of heaven if you will.
Natively developed intelligent life is still probably much more sparsely distributed than habitable worlds so expansion in one's neighborhood, once the post-singularity means are available to do so should be a direct extension of species development on their homeworlds.