Mathijs Kok of Aerosoft has posted some new information concerning the future of the Airbus/CRJ series.
Basically, Aerosoft has become increasingly disappointed with P3DV4 and the incomplete graphics engine. Alternatively, MSFS 2020 looks to be extremely promising and Microsoft is particularly supportive of third party developers.
Accordingly, Aerosoft will not develop new builds of the narrowbody Airbus series for P3DV4 – instead, expect smaller updates. However, Aerosoft will start developing the Airbus/CRJ for MSFS 2020.
Source: Aerosoft forums