How reliable is the persistency of the EncryptedLocalStore in the current version of AIR?

I've seen a lot of posts dating back from 2010 to 2012 where Adobe indicates one should not rely on the EncryptedLocalStore for keeping persistent data. They have indicated they will be making improvements, however I don't see any new information about it. I'm looking to keep persistent data on multiple platforms including Android, Windows, and Mac OS.

Older post about reliability: http://blogs.adobe.com/flashplayer/2012/09/air3-4els.html

- Greg