But what about support?
A friend at Cloudera asks the important question, "what about support?" He's right. This is open source stuff that big data practitioners like Facebook and Airbnb tend to support on their own. We'll see if Hortonworks, MapR, or, shudder, Cloudera, take an interest in supporting Presto and Airpal. For now it's something that self-supporting big data practitioners can experiment with.
The real question with these SQL-on-Hadoop options is just how much SQL to they support? Any opinions on the extent/up-to-dateness of Presto SQL support?