Well, until last year they were huge. Ostinato Strings, Ostinato Brass and Ostinato Woodwinds, each between 11GB and 20GB.
Then last year we got two, but they were tiny in comparison, around 1GB: Modal Runs and Ostinato Noir.
Yeah, I saw that. When I downloaded my AAS stuff (got them all!) there was the regular installer at 250MB or so, but also the NKS version (with sound examples) at almost 2GB.