However, CLNP is not deployed by any major ISP. It's not gradually replacing IPv4 either. A small percentage of users around the world have IPv6-only (+ some t

However, CLNP is not deployed by any major ISP. It's not gradually replacing IPv4 either. A small percentage of users around the world have IPv6-only (+ some transition mechanism) connections and have no issues using the general internet. This number is continuosly growing, and will continue growing. This issue will affect you inevitably, so I think it's extremely shortsighted to not-care about it.