I've been using the RF system for 2 years now and have yet to use the control ring.
In 18 months of R6 I never used, too; but I'm now using it extensively (both on EF-RF adapter and on RF lenses) with the R10, because it misses the third dial to control the triad aperture/shutter/iso.
I set the R10 as the R6, so front dial shutter and top dial iso; aperture is on the control ring on the lens/adapter, which is somewhat natural as it was there on manual aperture lenses (on R6 is of course on the back dial, which is missing from R10).
The iso button on the back of R10 has been reprogrammed to change the white balance.