Canon has said that RF lenses will communicate 'DLO' information to the body. On EF-M, Sigma lenses already do this.But we've already seen that Canon releases new firmware right before releasing a heavily distorting lens. (I'm not talking about the very minor distortions the top end lenses produce, I'm talking about lenses like the 24-240.)
What I think is happening with the firmware updates for the body is that the distortion parameters for those lenses couldn't be described with the existing standard, so Canon needed to update the correction algorithms in the body.
I've found it amusing that the RF white paper is very proud of RF lenses being able to provide the needed info, so you don't have to use a computer to register new lenses, but then require a body firmware update for pretty much every new lens they released. The fact that the RF16mm "Just Worked" was a pleasant surprise, so I hope we don't need any more body firmware updates for 'novel' designs.
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