Maybe being part of oneworld helps? I flew with BA this weekend (first time I've flown with them in over a decade!) and all devices were allowed to be switched on as long as they were in flight mode. Fortunately it was a short haul European flight so 99% of people had no interest in using devices anyway. I hate to imagine how hellish a CX flight landing in HK could be with devices allowed on....candy crush madness! I always quite enjoyed the respite from the HK phone-surgically-attached syndrome on take-off/landing....looks like those days are over.