I think the USC units are currently defined as fixed multipliers on top of SI units. The USC pound for instance is defined not as “the weight of this reference object” or “the mass associated with these multipliers on top the Planck constant,” but as 1 lb = 0.4536 kg (assuming four digit significance for now)
It’s dumb, but at least not entirely as dumb as having them defined as their own thing.
I think the USC units are currently defined as fixed multipliers on top of SI units. The USC pound for instance is defined not as “the weight of this reference object” or “the mass associated with these multipliers on top the Planck constant,” but as 1 lb = 0.4536 kg (assuming four digit significance for now)
It’s dumb, but at least not entirely as dumb as having them defined as their own thing.