Why so little in body image stabilization?

In lens stabilization also stabilized the "image" in the phase based AF system in typical DSLRs.  In low light and smaller shutter speeds where stabilization is often useful, many phase based AF systems "look" a bit longer to get good focus.  Stabilizing the AF system image certainly appears useful in this situation.  In body stabilization is most compatible with main sensor based AF systems like contrast AF.

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Leon
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