I've shot Canon gear since 1980, and am not a fanboy as such. Through the years I have had many criticisms for what Canon has and has not done. There was a brief time around the EOS10 and 20D timeframe where Canon seemed to be well ahead. When Sony bought Minolta and entered the game, at first it seemed they might do what Sony does.. buy in then soonafter exit out. They didn't. They have become a major player, and done some nicely innovative things. The one constant in all of this, for me anyway, has been how easy it has been to criticize Canon, sometimes getting frustrated with Canon (as in where is my lighter weight RF 500F4L lens?, or an equivalen tto Nikon's very lightweight 500mm F5.6 lens), and fail to see they have overall stayed strong financially and even with their "shortcomings" have made good products that in general have never limited me in any true sense. When the 5D3 came out along with Nikon D800, I read the hyperbole. How MUCH better the Nikon was at most everything, especially the sensor. I rented both, convinced it was time to change to Nikon after all the reports.. I bought the 5d3. It is easy to get caught up in online reviews, comments, reports and so forth. Most of us cannot afford to change systems everytime there is a new body (like one pair of online reviewers who go between Canon and Sony like changing clothes). I currently own two Eos R5s, and while some aspects are not as grand as the 1D MkII I owned, overall they have been the most enjoyable cameras I have ever used. Most missed shots are my fault (I do wildlife.. critters, birds, ). I see features in other cameras I would enjoy having and Canon seems resolute in its ability to irk me at times, especially how they deliberately withold simple functions and features from the 5 series Sony and Nikon offer in their $800 bodies. I would love to have a 500mm F5.6 lens that is as sharp as my 500F4 Mk II lens at 3 pounds.. hand holding the 500f4 at 7 pounds gets tiring. I would even welcome a 5 pound RF 500f4 that seems never due to arrive. The Canon frustration is very real, but the real truth is I am what holds me back, not the Canon gear I now own. Selling and buying into Nikon or Sony would result in their unique frustrations. Don't get me wrong, Canon does often irk me, but then just as I just did 25 seconds ago, I snap a wonderful photo of a juvenile Pileated woodpecker and smile!