AFD, just do the math, 450 first officers in front of you if you join now and 4 upgrades a month ( including the failures ...alot...) gives you around 48 per year....
450 / 48 is around 9 years, isn't it ???
There has never been more than 4 upgrades a month even when we were getting 12 aircrafts a year, because of training capacity.
And watch out the resignations of instructors, A330 /A340 and A320...talking of training capacity.
if it suits you to believe in their lies, good for you....
And don't complain after you join, as you have been warned....