Are reinforced springs worth it?

Increased payload with reinforced chassis springs possible Is it worth buying reinforced springs? What is the difference to standard springs?

Depending on the vehicle type, the difference is between 15 and 30%, which is demonstrably noticeable. And if you often travel with a trailer or drive in a carpool with 5 people on board, it's definitely worth it.
In addition to the standard suspension springs. BILSTEIN also sells the reinforced ones for selected vehicles.