Now I don't think it is completely fair to take what someone said during a presentation, and quote them out of context. But I just love this from Darren's presentation:
If NI had a replacement for Project Providers that was documented and stable and all that, then I won't suggest anyone make a Project Provider plugin. Until then I say there is a time and place for them, just knowing the edge cases, documentation, and support issues. I think Darren's presentation does a good job of cautioning others.