In standard Android yes, but on GrapheneOS has 1 (one) private space per profile.

Eagerly awaiting multiple private spaces so I can move everything to owner profile.

I used Facebook on my GOS phone. I thank Meta for refreshing my weariness of big corp.

Yes. And no. Develop capabilities to ensure you can defeat your enemy. Then scale down using game theory. It’s what has been done with nuclear warheads count.

Right now we can’t trust several players so yes, do arm. Also get into politics to prevent bad players (national or foreign) to take over the government.