Sony refers to the aspherical elements in their newly released G Master lenses as: XA (extreme aspherical).
That’s a curious choice of nomenclature because it hints at the marketing of any future lens advances.
Perhaps eventually we may see “super-extreme aspherical” or “awesome-extreme aspherical” lenses.
Or they may just make the leap to “super-awesome-extreme aspherical”. That would be super and awesome and extreme.
Either way, what’s missing this time around are the racing stripes.
(sorry to pick on Sony, as it seems like all the manufacturers are going crazy with lens nomenclature these days)