Meta programming is becomming more and more popular. The popularity of Meta
programming comes from the fact that many problems are made significantly
easier. There are a few specialized Meta tools out there, for instance the
Class:MOP manpage which is used by the Moose manpage to track class
metadata.

Meta::Builder is designed to be a generic tool for writing Meta objects.
Unlike specialized tools, Meta::Builder makes no assumptions about what
metrics you will care about. Meta::Builder also mkaes it simple for others
to extend your meta-object based tools by providing hooks for other
packages to add metrics to your meta object.

If a specialized Meta object tool is available ot meet your needs please
use it. However if you need a simple Meta object to track a couple metrics,
use Meta::Builder.