20 fps... that's modest by today's mirrorless standards. Unless that's a mechanical shutter.... in which case it would be amazingly fast. The R3 only manages 12 fps, though that's with a larger full frame shutter. It the 20 fps is electronic shutter, it's nothing special. OM-1 can do 50 fps with AF and metering. I wonder, though, if Canon might consider electronic shutter only in the R7, as Nikon has done in the Z9. If the sensor readout is fast enough to prevent rolling shutter effect, there's little need for a mechanical shutter.