Just Flight has announced it has halted development of the highly anticipated Classic 747 as well as the A300B4-200 for Prepar3D. According to the announcement, the reduced number of P3D users leaves these projects unviable for that simulator. The team states their regret for this decision, realising that there is still an active, though small user base on P3D that was looking forward to these projects.
Just Flight also announced that it will instead continue the development of these projects for Microsoft Flight Simulator. Switching efforts to MSFS allows the developer to take full advantage of MSFS latest features. More information about the development schedule will be shared at another time.