What does Configurable Dynamics Steering change? Resistance/stiffness at speed? I'm also still trying to figure out the differences between S mode and Dynamic mode. Am I missing something or is there redundancy between them? I see where the gear is displayed in S but other than that what's the difference? Does anyone switch between the options much?

 

Dynamic steering changes as you mentioned - the resistance/stiffness at speed, i think also changes the sensitivity.

S is for the transmission, holds the gear longer, keeps it at the lowest necessary gear

dynamic sharpens throttle response, stiffens suspension

 

Yup. S changes transmission behavior and is independent of the other settings. Also, depending on your settings, S may also enable the paddles.

Dynamic mode, assuming you have everything configured to dynamic, affects steering, gas pedal response, and suspension response (if you have the dynamic suspension).