Jolla's focus is to ensure it's as easy as possible to port apps from Freemantle/Harmattan/Elsewhere to Sailfish* via Qt5/HTML5/AlienDalvik, no more & no less. It's up to Freemantle/Harmattan devs to decide whether or not to support their N9xx users by back-porting... OR by getting Qt5 working nicely in Freemantle/Harmattan (if doable?) & maintaining their apps (tweaked for each UX) via it for Freemantle/Harmattan/Sailfish. *even port many non-core/3rd-party apps themselves (they also need to focus on sourcing content, not just apps)