Using C++ for libraries was not a bad idea but I think they got the architecture wrong. They should have used a protocol like gRPC streams or flat-buffers to co

Using C++ for libraries was not a bad idea but I think they got the architecture wrong. They should have used a protocol like gRPC streams or flat-buffers to communicate between core libraries and the platform UX libraries. Basically the mobile app is treated as a frontend talking to a backend using a communication protocol. You can design this to be stream-based, event-based, whatever fits the boat best. Depending on the platform, you can choose what should be part of the frontend versus what should go into the backend. This is the way a lot of the big C++ mobile apps are built. Also there are lesser debugging headaches as each part can developed independently thanks to de-coupling, so you can hire native platform developers to do the job they know best without messing with C++.