If you are using SAE J1939 it is an old standard and you are not able to enter the market with it. The marine sector is heavily looking into OPC-UA?

We also have to be pragmatic. It is difficult to find a controller that can fulfil all functions. Industry will use OPC-UA, but in mobility you don’t use a PLC but an embedded controller, and controllers for J1939 are readily available. For other applications it may be necessary to use a gateway for the communication with the FCM