Thanks for the responses!
Sorry, another question: I see in reading various wiki entries that the last of the Gestalts died some 800 years after the events of the original Nier.
Not exactly gestalts, but humans.
After the WCS was dealt with, in some communities where the Androids (Devolas and Popolas) were more in control, the Replicants accepted to merge with their respective Gestalts and becoming human back again.
I think all the shades/gestalts that were left after Shadowlord's defeat went nuts and died, but some veeery small percentage of humans managed to return to life. Though they still would have to deal with the crazy shades around the entire world, broken multiple times; no wonder they went extinct after some centuries.