Part and parcel of my getting my 1st car back in 1963 is that my parents mandated that I install seat belts in it. Every car I have owned since have had them (even when not factory installed). I got rid of my 2003 Durango with 359K on the clock for one reason and one reason alone - the $500+ cost of replacing the driver’s seat belt that would no longer extend. My race cars for the past 30 years have 6 point seat belt systems that get replaced every 3 to 5 years by rule at roughly $200 a pop. Since 2011 it is also required that I use a Head And Neck System (HANS) of restraint to prevent basel skull fractures (what killed Dale Earnhardt Sr.)