I also appreciate Fro's candor and generally knowledgeable videos.
In my opinion, he is completely correct about the EVF being problematic for any type of action. Using the EOS R for action--even toddlers? Frame subject, focus, guess which way the subject is heading, hit the shutter button for a burst, and hope for the best!
Thanks to his videos and a few others, and a few members here who share experiences accurately, I knew this going in, and accepted the fact that the EOS R would be a stepping stone to a better mirrorless, something that would work very well for portrait photography while giving me access to the Rf lenses I've been longing for.
Members here who do like their R's emphasize the AF accuracy, something that really cannot be appreciated just by reading or watching a video. Truly a boon for portraits.
The other great aspect of mirrorless is being able to see tiny changes in exposure as they affect shadows and highlights on faces--before making the capture.
Does it work for landscape too? Yes, but I don't see a single advantage in this type of photography over a 5DIV at all. Remember, the 5D IV's Live-View AF is quicker than its predecessors, also accurate, and just works great for still-lifes and landscapes. Plus, sad reports are trickling in about the R's susceptibility to water droplets seeping into the EVF.
For all your antics, Fro, you are providing good info for these purchase decisions.