[ppml] too many variables

[Randy Bush]

the fib in a heavily peered dfz router does not often converge now.  the
question is when will the router not be able to process the volume of
churn, i.e. fall behind further and further?  as there is non-trivial
headroom in the algorithms, moore's law on the processors, etc. etc.,
your message is as operationally meaningful as dave and john telling us
they can handle 2m prefixes today.

randy