According to the documentation for DM1090FFC
The OAK-FFC-3P (DM1090FFC) baseboard has 3 FFC interfaces which allows for:
However, when I connect two 4-lane MIPI cameras to right and left sockets (both as ColorCamera) and leave the RGB socket open, I am still able to run things like Mobilenet inference, Yolo inference, h265 encoding for both cameras. The 4-lane MIPI cameras I tested and are proved working are IMX378 modules, IMX214 modules and IMX477 modules.
Is this a reliable behavior from DM1090FFC? If I just need to run two 4-lane MIPI camera as ColorCamera, can I use DM1090FFC for that?