>> It looks as if PGP's days are numbered

Comments like this are inevitable and represent Facebook's attempts to induce us to route all of our communications though its platform. For the quoted commenter, it's probably too late.

PGP has failed to provide "encryption for the masses".

PGP fills a niche that OTR and Axolotl do not. It provides a bunch of operations that are not supported by OTR (anything that requires signatures that are verifiable by third parties). PGP is used by the masses (package signatures and similar functions), it's just that they don't use PGP for communication.

PGP while a decent technology is very cumbersome. Worse, it's easy to shoot yourself in the foot if you aren't an advanced level user. I've used it for years on a regular basis with various implementations. It's just never been user friendly or easy to use. If it was more user friendly it might have had better adoption rates. As moxie has pointed out, we need something better for the masses, it looks like we are finally seeing progress towards that goal now.