"For other models, an update of DPP 3.14 will be released."
Yet another reason for the DNG standard.
How's that Chris? All models (even the Raws from my Powershot G3) are
fully supported by a free DPP 3.xx Rawconverter from Canon (and also by a slew of others, including RawTherapee, and many others that are often based on DCRaw, available for Mac/Win/Linux).
The new more advanced features of DPP require certain camera hardware, and Raw formats, to be able to convert/correct/optimize, so it makes no sense to drag along backwards compatibility for models that miss the features that are needed. Two separate versions seems to make sense for easier maintenance.
It is already the case that e.g. some legacy lenses do not transmit certain parameters that are needed for distortion correction (e.g. distance), which produces menu choices in DPP that do not function, and that will only get more often to be the case as new features are added to the new hardware and Raw files.
DNG won't be able to understand those new tags or maker notes (why would Canon in this case try to explain their function to their competitors), let alone utilize them, so the best it can do is copy them to the DNG as deadweight/bloat. DNG adds nothing, it's just a wrapper around a Raw that can already be better decoded by other programs.
Cheers,
Bart