Brilliant!!!Hmm, I dunno... you have to think with a corporate group-mind. If the market isn't adopting a New Shiny Thing, that means, in corp-think, that the market is stupid and lazy and needs to be beaten into doing the Right Thing. So I wouldn't be at all surprised if lens-mount interoperability began to 'deteriorate'; maybe IBIS will only work with RF lenses, due to the communication data-rate needed...
I don't know why I didn't think of that. I guess that's why I don't work in marketing. Lens IS only working in conjuction with IBIS on RF lenses would be a classic "special feature" of the new mount. IBIS not working at all with EF lenses would be even better.
A highly desirable feature with a plausible and defensible explanation for why it can't work with "obsolete" lenses. No competent marketing manager would pass on an opportunity like that.
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