You can discount 100%, and I will still not buy a product unless it is specifically designed for P3Dv5.
What exactly is a product "specifically designed for P3D V5?". Under the general FSX/P3D family of product we made, there several differences:
- Products that were made primarily for FSX, which work in P3DV5 using the backward compatibility, and might have minor issues. These are CLEARLY listed in the FSX product page, with a warning about using them in P3D V5.
- Products that were made for both FSX and P3D, which have been well tested in P3D, and have some differences in the installed files, to handle the differences between FSX and P3D.
In this category, you'll find airports like CYVR, KSDF and KCLT and, while it might "look" they are derived from FSX, just because the installer it's the same, they show different objects at runtime, drawing native P3D objects for the things that matters most (usually ground textures), but it might not be very obvious, because our custom software checks the simulator version and displays different objects depending on the simulator in use.
- Products that have two separate installers for FSX and P3D, because the differences are extensive, the most striking example is GSX and GSX L2, which have two completely different sets of objects between FSX and P3D (Legacy rendering or PBR)
- Products that DON'T HAVE AN FSX version, so they are truly "P3D-native". KORD V2 and LFSB are like that, made from scratch for P3D and NOT a conversion or a port from FSX.