A couple of months ago I read that there were only 1875 "ceo" positions left before going "all neo" in 2018
Unfortunately I can't find the link anymore..
But what I tried to say, in that month (not to long ago) the A320ceo backlog was at 1802 units, so only 73 ceo's left. With Lufthansa taking 30 yesterday, Easy taking 35 now and 3 in May there might only be left 5 ceo's to sell (or I'm totally wrong and it's sold out now )
Please correct me if I'm wrong, I tried to google the article but it seems it vanished from the net......