Platinum is one metal for which absolute scarcity is
likely (Bloodworth pers comm), because of its unique
catalytic properties (eg car exhaust cleaning and
process chemistry). The related metals palladium,
rhenium and osmium may also become limiting.
Rhenium is not a platinum group metal.
If they\’re getting this sort of stuff wrong then, well, what weight to place on the bits that I don\’t know in such detail?