[ppml] PIv6 for legacy holders (/w RSA + efficient use)

[Paul Vixie]

> > the value of an address is that you can reach other people with it,
> 
> Not quite.  The value of a globally unique, routed address is that it lets
> you provide services others can connect to.

i meant by statement reflexively.  "to reach and to be reached by".  hopefully
you did also, and you're not saying that there's value in being reached, but
no value in reaching.  (there's also technically a symmetric case where
synchronization is external and there aren't initiator and target roles.)

> > and if other people can't grow in IPv4, then why would you care to?
> 
> To provide a service to the 1B+ people who are connected on the  Internet
> today?

nobody makes a business plan involving the investment of new capital where the
returns will be declining.  investors internal and external large and small
want to know, "where's the growth?"  after ipv4 depletion, growth will shift
toward ipv6.  it's already foolish to invest in new capital in new non-
dualstack networks, and it will get increasingly more foolish to do so as we
reach and pass depletion.