You get to a point in your life where almost anything you buy will outlast you. I am not sure it matters. My big problem with scandium revolver frames is the cost, not the durability. My big problem with titanium cylinders is the warning about special care required for cleaning the titanium, not the durability - although durability is certainly an issue if the wrong type of cleaning solution or scrubbers are used. If you can get past those issues, then scandium will probably do just fine - perhaps longer than Airweight aluminum, perhaps not as long as carbon or stainless, but who cares?