The point is that it gives you options. You might not want to have anything on a network reachable from the internet today, but next year you suddenly need that

The point is that it gives you options. You might not want to have anything on a network reachable from the internet today, but next year you suddenly need that capability and it's useful to be able to take advantage of that, rather than wading through the buggy mess of NAT. > It's a complete non-issue that nobody really cares about. A significant number of people spend a significant amount of time trying to carve out and re-use address space in their existing IPv4 allocations and RFC1918 space. This becomes nightmarish the moment you start thinking about networks of any significant size and complexity. All of these problems go away with IPv6, and we care about that a lot.