"OPML inclusion is a good example of the problem I am trying to illustrate. In the context of lists of lists I would need to convert all of my feeds to OPML. The only value I see in doing this would be to enable my content to be editable in your OPML Editor thus making my content incompatible with all the tools and infrastructure that currently exists for RSS and Atom. I can't see why any developer would want to do this or how this proposition would benefit the domain of open content distribution." - scott anderson