Originally posted by rparmar I don't care how good the camera is, it is impossible for me to ethically support such unreasonable wastefulness and forced obsolescence.
By this standard, no K-7 owner would have been allowed to upgrade to a K-5. Think about all the body wasted for what was essentially just a sensor upgrade.
We can agree that the best modularity is achieved by separating body, sensor, and lens.
The conventional approach is to glue body and sensor together which has its disadvantages (see K-7 -> K-5 upgrade).
Ricoh's approach rationalises that body and sensor do not need to be matched but that it makes sense to match a sensor to a lens and vice versa. So while it does not achieve full modularisation, it at least glues together what appears to belong together. And, any camera which ties all three -- body, sensor, and lens -- together is more "wasteful" by definition. The GXR approach is definitely an improvement when you take this (quite common) starting point as a reference.
The approach is not wasteful if you consider the possibility that the lens modules will continue to take great pictures even if better sensors become available. If an updated version of the FA 77/1.8 is released, does that mean that your copy is suddenly waste and needs to be replaced?
It may not even make sense to combine the lens of a current lens module with a better sensor because the lens resolution and the sensor resolution are matched and any change would be for the worse. Sensors have become so good regarding noise and dynamic range that you won't see dramatic improvements in the future (the K-5's sensor is very close to an ideal photon counter within the Bayer matrix approach). Hence there is no urgency to mate the Ricoh lenses with future sensors.
At the very least, the Ricoh GXR approach allows to separate body, sensor, and lens by means of offering mount modules. If Ricoh offered a number of mount modules (such as the forthcoming M-module) the GXR system could take off big time.
The Ricoh GXR approach requires a different mindset and appears to be illogical and too expensive at first. When you start to think about it, though, and make the right comparisons as many in this thread did, it makes a lot of sense. It may not become a commercial success, but the latter has never been a good litmus test of technical excellence.