It's inevitable and they simply don't care about fairness, bad rosters or anyone getting stuck. Ek makes money, not friends. There were many FOs who wanted off the 330/340 but couldn't for years because of the policies in place at the time. Now guys are going over in a year. The 330/340 fleet is slowly shrinking and will be gone eventually. Some guys will get seat locked until the fleet dies. It happens at every airline when retiring a fleet. The good news for those guys will be the cushy rosters when the fleet gets down to just the 345s. They simply can't keep hiring onto a dying fleet. 380 Defos save the company lots of money in the short and long term.