Please try to take some picture with say Fuji XH1 and its 100-400mm lens with IBIS only and OIS switched off....
so - where's the problem?
sounds like a justification attempt for a cost-saving measure. for the specific video-centric camera model the assumption of tripod use may apply. but definitely not for cameras like EOS R.
sure, IS does not help against motion blur with moving subjects and long shutter times.Please try to take some picture with say Fuji XH1 ...
-- or -- with fujifilm 16-55mm take picture of a family birthday party when the light is off and kid is blowing the candles.
Question: can (or does current) sensor stabilization have unique settings for each lens or camera motion?
So. This means that flange distance has little to do with the eventual demise of the EF mount, and everything to do with the increased communication speed.
i don't see anything that would support this conclusion.
in-body sensor IS does not have to be lens- or camera-specific. sensor input plus software that analyzes image from sensor in real time and determines actuator inputs to position sensor so that image stays centered on it. No matter, what lens may be attached to camera.