Wrong! The entire issue is a lack of a universal raw file format! Had this been implemented, there would be no such issue.
Andrew, that still doesn't make sense, no matter how often you repeat it.
Camera RGB is universal (although some e.g. use different blackpoints or store the data in non-linear response curves), but useless without calibration of some sort. So any time the camera's CFA characteristics change, any Raw converter software maker must determine the best parameters to use in their specific (usually undocumented)
Raw demosaicing method by trial and error. Even between cameras of the same type, there may be (small) differences.
Besides, camera Raw formats are typically TIFFs with known (Tagged) storage positions for the various parameters, but the actual data stored at those offset positions can differ between manufacturers and camera models. So it's not about the file format but about
interpreting the data itself. Even if the file
format would be identical between manufacturers, the data would still need interpretation and calibration for the specific
demosaicing process one wishes to use. So with each new camera introduced to the market, there will be some effort required,
unless all software producers use the same demosaicing engine. Don't hold your breath for that to happen ...
It's mostly about
the software, not the camera producers (unless they use non-standard sensor designs, e.g. Foveon). Camera makers will keep on innovating (one hopes), therefore some of the new features must be recorded in the known Tagged Makernote position of the EXIF data, because they are unique to that camera model and other camera makers have no need for an agreed standardized file format for that. Again,
it's about interpretation of that information, not the file format.
Cheers,
Bart