User blog comment:DYBAD/Character Sheet/@comment-4867780-20170115114651/@comment-4867780-20170120073503

I never really decided on a given size regarding Selforge City's population, since the inexhaustible resources, extreme structural flexibility and large-scale fertile immortality mean that said population is bound to increase indefinitely at an accelerated pace (all generations remain and produce a new global generation everytime, instead of gradually replacing one another over time), which would make any number outdated very quickly.

To give an idea, Selforge City is a continent that expands indefinitely with its population, spacing itself out as new districts, areas and facilities continuously appear among existing ones, its external borders seamlessly rejoining themselves despite its flat shape via spatial engineering just like planets normally do.

Selforge is an artificial plane (Selforge City is a demi-plane due to its relatively limited size), so the resources involved can only come from other planes. The Bottomless Genesis Well is highly convenient in that it is a virtually infinite multiverse (albeit a lifeless one) bottled up within a tiny sphere, automatically providing all the resources required without having to endlessly raid other realities for more materials ^ ^;

As you noted though, PIM technology essentially removes the need for resources within Selforge boundaries, so the BGW mostly serves as a complementary provider to balance the accounts and back-up insurance for the future. It is outside of Selforge that it proves extremely useful, as it can power-up any of Lawrence's myriads reengineered abilities to virtually infinite levels, and fuel the materialization of nigh-unlimited constructs/summons.