Is it corner cutting? Or is it that nearly all extant nuclear power plants use very early designs with poor safety controls. Imagine how much worse car related

Is it corner cutting? Or is it that nearly all extant nuclear power plants use very early designs with poor safety controls. Imagine how much worse car related fatalities would be if we were all still driving model T's with no crumple zones. (poor example really, because cars are inherently unsafe and nuclear energy is not)