Interesting - I've never seen this because the only habitats I've built were on complexes. Can you show a screenshot?

Population grow very slowly with births and can die if a sector is overcrowded and if there is a starvation.

Also population can migrate over time to others sector if others sector population wealth or happiness is higher. Happiness increase if population can buy different resources in habitat, wealth increase with salaries (salaries are the money cost of stations, factory cycles, etc. Money never disappear when spend in Helium Rain)

If the population of you sector decrease with a good supply of goods, it's mean that others sectors have probably a better "sum of salaries"/population ratio and migrate.

The "no factories" is not important. The habitat station work differently : it is not a factory, but more like a shop for the population and they buy the goods at high price with the money received from salaries

Ah thanks for the clarication.

Maybe if there was a method to see overall systeem population or the population growth/shrink for a sector this would be clearer?

How does overcrowding work? Too few habitats for the population? How many people per hab is ok?

It does seem weird that Blue Heart has lost half it's population in my game despite an active economy. I'll build some more resource consumers and see if that changes it.

oh wow, thats amazing.

If I have the only foundries and monopolize tool production, everyone will start moving to my sector?