More than 1,000,000 sims in a city seems almost impossible to me. My biggest city so far had around 300,000 of them and I was running out of space with the constant demand for industry and commercial zones. And yes, most of the housing was high density.
So, if anyone has good hints about how to build cities with a population over 1,000,000, tell me pls.
Greetings,
Jan