Thank you for this! I wasn't aware that anti-roll bars carry that much importance in a rudimentary model. I will look into that next, and update the article accordingly once I get it working.
At the end of the talk, and article, there is a short video demostration of the current state of the game engine, and it has hills and banked curves and whatnot. For the talk I opted for a flat grid.
Suspension is implemented as well but it didn't feel to me like a unique problem to implement for cars, at least not a simple suspension that can carry a car, and it didn't fit too well with the flow and limited time I planned for this.