I believe GP was referring to the NAT-busting abilities of onion services, as well as the ability to get domain names you control via a private key. Of course,

I believe GP was referring to the NAT-busting abilities of onion services, as well as the ability to get domain names you control via a private key. Of course, another solution would be IPv6. If you're referring to private IPv4 addresses, I can't see how that's relevant.