The number one requirement of any camera is to produce good-quality images. It doesn't matter what other features a camera has if it produces poor-quality images. Tony Northrup recently posted a video comparing the image quality of the new Canon EOS R to several other cameras.
Northrup compares the new Canon EOS R to the Canon 5D Mark IV, the Canon 6D Mark II, the Sony a7 III, and the Sony a7R III. While I usually shoot Nikon cameras, I enjoyed Northrup's review since he compares the EOS R to not only other mirrorless cameras but also to different price range and styles of cameras. The EOS R faired well when compared to the other cameras, but like all cameras, some perform better in different ways. The video does an excellent job of describing how the EOS R stacks up to the other well-known cameras. Northrup addresses what he believes to be a significant flaw with the EOS R, which involves an aspect of the dynamic range of the camera.
Is Northrup right to be concerned with one issue he believes is a flaw with the EOS R? Is this flaw enough to deter you from purchasing the new Canon EOS R? Or is it an attribute you can accept in a camera that has many other strengths?