SC4 intentionally made it stupidly easy to make the city work financially and also killed what I thought of as "the game god." It's all ooh, shiny and can be fun in a largely superficial manner. But I don't think it works well as an actual city simulation anymore.
(SC4 followed the company acquisition. It has a more polished, corporate feel and it's cool that it has things like recycling centers. But I am not really a fan.)
I cannot find an article about it, but one city uploaded it's data to SimCity and got surprisingly solid city modeling results. This was before the joke that is SC4.
Edit: Geez, can we not downvote the comment I'm replying to? I left out the fact that I primarily play SimCity 3000. It's a perfectly reasonable reply that prompted me to fill in missing details that I hadn't thought to include in my original comment.