Well, not really just the enlarged address space!
The enlarged address space is the *primary* benefit. While there are
certainly numerous other benefits, they are arguably secondary.
There do exist certain other definite benefits of IPv6 like possible
use of Flow Specifications in the Flow Label,
At this point in time, there is still a lack of consensus on how the
Flow Label should be used. Or more specifically, there is as of yet no
driving application that has led the IETF to define how the bits will
be used. Thus, pointing to the Flow Label as an argument to move to
IPv6 is unconvincing to most.
decreased processing delay at routers, greater flexibility etc.
All useful benefits. But very questionable as to whether they are
significant enough *by* *themselves* to lead to adoption. That is why
I consider them secondary.
This is not to say that the IPv6 is answer to all problems, but just
to signify the worth of the effort of those working on it.
Yes indeed! A lot of folks have invested a lot of time and effort in
IPv6 getting it where it is today. They deserve thanks for their
efforts, and I thank them.