Funny, this is exactly why I am in PSTG and ANET (and NTNX as well). All three offer not just technology but easily demonstrated cost savings.
PSTG in particular has a compelling story. With most new technologies it is often cheaper to do nothing at present. If the existing and paid for technical infrastructure serve the immediate needs, why do anything. With the PSTG evergreen pricing there is a compelling reason to swap out the existing storage infrastructure.