It may take until then until IPv4 stops working, but it will be before then that it becomes less optimal, and possibly more expensive. Heck I already experienc

It may take until then until IPv4 stops working, but it will be before then that it becomes less optimal, and possibly more expensive. Heck I already experience slowness due to some freshly installed systems trying IPv6 first (DNS lookups, connection attempts) and only on failure falling back on IPv4.