My readers know me as The Wildlife Ho-tographer. I have been using Canon gear for over 30 years. You can follow my travels on Facebook, Twitter and Instagram, see my equipment bag and works on MichaelDanielHo.com
Throughout the decades, I have owned and/or used all the EOS camera lines. I bought my first EOS 1 back in 1989 as my main camera and have upgraded to every model since. Now the EOS-1D X Mark III is my primary body and the EOS-1D X Mark II and EOS-1D Mark IV are my backup cameras.
As you know I am not enamored with mirrorless cameras. When the EOS R was first introduced, I was invited to a VIP preview but found the camera wanting. The latest EOS R5 and R6 are great improvement over the original EOS R but they are not there yet and not wildlife centric cameras.
My biggest dislike of mirrorless camera is their small ergonomic size, limited battery life and 'slow' EVF as compared to the real time sensation of SLR cameras. The EOS R5's BG-R10 grip solves the battery life problem but I do not like the looks of addon grips.
The EOS R1 has a comfortable grip sculptured into the camera body and holds a robust single battery. With the expected first-in-class EVF performance, hopefully with practically no latency and IBIS mated to a mid 20+MP state-of-the-art sensor will certainly make a buyer out of me. However, I will not be buying any RF lenses. My complement of EF lenses have served me well and I do not need another series of lenses to clutter my equipment bags.
Stay tune as I get the latest leaks and information concerning the upcoming EOS R1. If the Japanese government is serious about hosting the Summer Olympics on July 23, 2021, Canon is likely to have a development announcement in early 2021 and possible limited delivery in time for the Olympics.