Let's see... Can I get a /10 IPv4 block for my company without paying a small fortune? Can I do the job using IPv6 only? Does the vast majority of mobile and em

Let's see... Can I get a /10 IPv4 block for my company without paying a small fortune? Can I do the job using IPv6 only? Does the vast majority of mobile and emerging market customers have end to end connectivity? If the answers are "No", "No" and "No", I would have to say that indeed, IPv6 really is a failure, after two decades and monstrous investment thrown at it, it has failed to solve any of the practical issues it was supposed to. It's a gigantic failure, both in a costs vs. benefits approach, but exponentially so when considering the opportunity costs of being still stuck with IPv4.