> It's just that there's no intrinsic reason that the same company that gives away labour as OSS should also make the best complements to that OSS.

AWS's version will likely always lag on features, whether it's their Elasticsearch service or this new DocumentDB thing. So to continue the music industry analogy from the original article, sure Taylor Swift may or may not be able run the most reliable streaming service but she'll still get business if Spotify/Pandora only has covers of her songs.