They are still available on the Lyon b2b for sportiva ordering so I'm not sure if it's just stock that is left in the warehouse. I think a lot of shops wish to try some of the newer models, so are making shelf/stock space to give the new ones a go.
I forgot to add, the importer/distributor (Lyon equip in this case) often decide to stop bringing in certain models as is the case with the Boulder x making way for the newer tx range of approach shoes.