Not for me. I have no lenses that would fit that camera. Ive never seen the point in investing a lot of money in two complete different systems. I have a feeling a lot of Canon owners would feel this way.
For me the R will be the camera that will give me whai t need. The from factor of the M50, and the IQ of the 5D4. Obviously it will have quite a few better bits than the M50, but these are enough to make me sell my 5D4 as soon as i have the R settled in. The only reason oi go back to my 5D4 is for its better quality in low light, and the fact that i feel guilty not using it. I certainly don’t need it.