Nobody answers your question so let me try my best (some got too much emotionally involved).
The way I see it is that Canon tries to deliver to us a camera that today's technology cannot do yet.
I like their approach and I am very pleased that they did so.
The R6 was designed the old way: "this is what we think you should have, so have it whether you like it or not". The R5 went the opposite direction: "We give you a bunch of options and you choose what you want". People's problem is that they didn't take the time to sit down and choose the right option for them. They simply want to use the latest and greatest option and demand that it works their way, but our technology is not there yet.
To make things clear right from the beginning; the R5 does NOT overheat at 10.2.2, Clog, 29.97fps, 4K, full frame, ALL-I; as per Canon (watch the video again:
). This is the standard of today's camera. I shoot band concert, choir concert, community and church events and 90% of my clips were shot at 4K 29.97fps. I do use 60fps but only for the sake of B-rolls and these are 10-30sec clip max.
My opinion, if someone has to complain, complain about the overheating of 60fps 4K. That would make sense to me.
For a comparison, my current camera, 1DX II, does not overheat at 60fps, but it has a crop of 1.4. The R5 does overheat but it is a full frame. It totally make sense to me that someone wants to take long shots during a wedding at 60fps for the sake of slow motion. But if the wedding really is that important to you, have a backup in the form of Ninja V and cover the entire wedding with it, while recording internally only during crucial moment.
I hope that soon enough, Canon will allow a dual recording of standard 4K 29.97fps, both cards can do it, then why not?
Other than that, all the complains I have heard don't make any sense what so ever in my mind.
You do shoot long takes during interviews but it makes a lot more sense to shoot an important interview with two cameras with both on Ninja V. I tried to shoot with only one 1DXII and a Ninja Assassin, but once in 6 years, the camera shut down in the middle. I restarted but didn't help. I removed the battery and then continued to work again, but I lost 30sec of interview. I won't do that again.
Shooting an interview for the sake of cropping doesn't have any practical sense at all to me, unless you are interviewing for the sake of practice. Please have two cameras so that in case one fails, you still have the other one. Do always dual recording, short take internally, long take on Ninja V. Whatever overheating problems your camera has, the Ninja V resolves it.
In my mind, the 4K 120fps is not for interview nor wedding long take, because it doesn't have a sound.
Long take on 8K costs too much, in terms of CFExpress, hard drive, computer power, and most of all exporting time in Premiere Pro. It doesn't have any possibility of primary/backup with Ninja V and no possibility of dual recording, unless you record 4K on the SD but that defeats your purpose.
If you need to complain, complain about the 4K HQ, but you get 29.95min on that, and you cannot get the same quality on Ninja V anyway (your backup will be on lesser quality).
To me, the 8K, 4K 120fps, 4K HQ, 1.6 crop 4K are all for B-rolls and these are all less than 1min long (with the majority at 10-20sec long).
For the first time in 6 years I am not complaining about Canon, because they gave me exactly what I wanted: "the ability for me to choose" regardless of the technology restrictions. Give it to me and let me decide how to use it.
Trolls always complain about anything and everything, don't be one of those.
By the way, the R6 4K overheats, the R5 doesn't. The R6 oversamples (hence the overheating), the R5 doesn't, unless you choose the option to.