The post (marketing article) says nothing and doesn't identify what vendor they are trashing. As far as I know my 'IaaS' vendor doesn't retain root access. The article makes almost no sense, it starts be trashing iaas, then suggests paas, with out attempting to explain any difference between a 'platform' and 'infrastructure'.
The only thing missing from the article is an affiliate code on the enstratus link. Then it would be fully clear who wrote it and why. Has anyone not selling something ever uttered the phrase 'deploy best of breed solutions'? I think not.
If my current iaas vendor retains root access then I certainly don't want a more 'managed' solution.