A rigid chassis allows more precise control of wheel movement, as only the suspension, not the chassis frame, moves. And it moves as designed, with no random input from chassis flex. For everyone else, a rigid chassis allows softer suspension tuning for a given level of handling precision, meaning more comfort with no lessening of control. I had the opportunity to drive and ride as navigator on a variety of roads near Stockholm. No potholes, few frost-heaved expansion joints, just smooth pavement on major highways, secondary, and tertiary roads.
Swedish drivers are courteous and attentive.
Imagine, you pull up behind a car to pass, and the driver has been checking the rear-view mirror and moves over for you. This is where those wide shoulders come in handy. And, of course, you are expected to check your mirrors, too. The anti-destination league seemed to be thankfully absent. The S60 really can be considered to be in the same league as the BMW 3-Series, Audi A4, and Lexus IS300, especially in T5 trim.