I haven't heard of issues with the rest. I would think that injector failure is a very likely consequence of ongoing driving with a failed HPFP. Equally likely is that so many dealers are unaware of the HPFP issue that they read the fault codes and land up replacing the injectors unnecessarily (as you will get injector-related fault codes when the HPFP fails even if the injectors are still working).
ghusheshe: sorry to hear about all the troubles you've had. It sounds like they just don't know what is wrong and are replacing anything related to an error message on the engine management. Unfortunately, that's like dealing with the symptoms rather than what's causing them.