SFOS app framework is architecturally broken by design and the related business model is not sustainable even for small business. Even if they manage to make sustainable for small size in the future, it cannot scale up profitably in any ways.
In brief: it worth nothing and cannot be fixed by a refactoring. Just wiped away and completely replaced. Sorry, about your frustration but I am too talented to waste my time lying about this. Also because every senior like me, s/he would reach the same conclusion.
POST SCRIPTUM
The reason is pretty straightforward, it has been designed for automotive market and not mobile market plus it has been designed to create a lock-in for automotive makers that adopt SFOS and wish to develop their own application.
Also the porting to Pinetab without 4G and A/GPS goes in that direction. It is the last desperate attempt to fit into a niche of a niche: cheap cockpit based on open hardware platform.
Betting on a cheap cockpit was part of my proposal to join Qt in order to help Jolla to develop the only miche-of-niche in which they could hope to make some cash flow in the immediate with the as less effort / investment as possible.