Harry may well be right and as he says, nobody really knows. I would add that the 380 fleet will start shrinking after 2021, partly offset by the delivery of 330neo/350 but who knows how many of those will turn up and how quickly.
I'm not sure that 50% of us are due to retire in the next decade though, it is quite a young workforce.
The take home message is that this is no longer the place to come for a sure-fire quick command. You have been warned.