I think it's less about strict hardiness and more about suitability for mass growing in Washington. The Honey crisp has declined because it's getting grown in p

I think it's less about strict hardiness and more about suitability for mass growing in Washington. The Honey crisp has declined because it's getting grown in places it doesn't really do well. The Cosmic Crisp is bred for those very places. So it may not be as good at peak (or it might, here in WA the peak of the Cosmic Crisp can be pretty high indeed) but it should stay strong over the years.