They don't drop jackets often (is this the first?!)
No, the first Paramo was the Nevada smock, long gone but you can see where the Velez started off. The Cuzco disappeared too, the first jacket launched alongside the Nevada bears little relation to anything in the range now IIRC.
Sometimes a company get something really really spot on and then discontinue it in the name of "progress".
Sometimes they do (Rohan are particularly good at it IMHO), but in the case of the Nevada the progress really has been progress.
But often the case that you can't keep good things in the line that don't sell: it's a business, not a design museum.
Looking at the Viento... I was put off by too many whistles and bells adding too much to the weight. Compare and contrast to the Finisterre Storm Track, which is my idea of what I'd want in such a jacket: it gives you a 25% weight saving and still has everything I want.
Pete.