You see the same problem in aviation. Other than the largest commercial airliners that are used in the most developed countries to fly passengers, most aircraft

You see the same problem in aviation. Other than the largest commercial airliners that are used in the most developed countries to fly passengers, most aircraft (cargo, general aviation, etc) are all using 50 year old designs. Why? Liability. Despite instruments having become much lighter, heartier (to weather conditions such as icing, etc), and more accurate than in the past, aircraft continue to rely on old designs. Because nowadays, creating a new aircraft and certifying it costs a _lot_ of money. So Piper, Cessna, Boeing, and others continue to use old designs that have already been certified, despite there being cheaper ways to achieve just as reliable or more reliable aircraft due to newer technology.