Houndreds of FO have enough hours and are waiting for their call on all fleets. Forget about upgrade in QR. It takes more than 9 years, if you are lucky enough. Regardless of your fleet. Airbus -> Boeing, Boeing -> Airbus transfers, depends solely on company need. Mix fleet is being slowly prepared for those who are on 777 and 787 to maximize efficiency of roster planning and reduce menpower needs, however it’s gonna take time to train all 777 and 787 pilots.