LukeM

What the hell is this video, @Andrew Reid? This is not at all how to make a Youtube video. Here's what's wrong:
You need to start it with something like: "Hi guys, this is your boy Andrew here with EOSHD" You should have pink and teal background. X-mas lights at a minimum. Shallow depth of field? Everything's in focus! Where's the mic? You should be eating that thing! Think 25-30% of frame. Where's the obligatory Squarespace or Skillshare ad? If you can't get that, you should be at least pimping some software like "Cleanmymac". If you're going to talk trash about Canon, you should at the very least put some links to it on Amazon in case someone accidentally clicks on it. NEVER tell others what you actually think about product(s), certainly not after using them. You're just supposed shamelessly promote them or trash them, regardless of any usage. Focus on the specs primarily. Your thumbnail needs to have some super-inflammatory phrase (in yellow) with your mouth wide open. Here's an idea: "HASSELBLAD GETS DESTROYED? Plus, I lose my SH*T!" Finally, you look far too normal. Can't you shave your head or get a tattoo on your face? I'm sure there are more things wrong with this video. You've got to love Youtube nowadays.

I don't really understand what you are saying.
Anyway, yes it's great that the community and individual users put in the hard work and came up with a workaround so you can feel better about giving $4000 to Canon now... a company that in my opinion lied to their customers, refused to apologise, refused even to acknowledge anything was wrong. They are not off the hook. An official fix and apology is the only path back for them in my eyes, and whatever little reputation their sales & marketing people have left in terms of honesty.
In my opinion they knew they'd played fast and loose with consumer law as well - which in my opinion was what the latest firmware update was all about - ensuring that they couldn't be sued in a class action by not measuring temps in the first release of the camera. In my view, the second firmware adds the temps into the mix in a pretty superficial way just so they can claim it's actually about temperature and thermal protection!
Disgusting behaviour!
Let's never lose sight of that and stop demanding that they come clean.

Just catching up on what is probably already old news on this now.
The firmware update "fixing" overheating is exactly the sham I was saying I was wary of. Get a few youtubers with a big neon "Overheating Fixed????" in their video thumbnail and there's just enough misinformation then to keep people buying the product. After those initial first wave of remorseful people who got the thing already, of course.
Quick firmware updates that don't really change anything (Fuji XT4 IBIS anyone? IS Boost suddenly does worse than nothing? NOT fixed) and nobody's sure what to believe anymore. "Oh but I heard they fixed it?"
Hope it gets hacked to bits like the GH2 and people who have bought it get a workhorse to grow into for the next 10 years instead of buying another canon body.

"Solved" or not, this is utterly ridiculous and no one should reward Canon with their business even if these cameras are your ideal tool. 
Please, reward honest and ethical companies with your business. It is the only way things will get better for all of us. 

Very odd indeed! Might be last minute decision, or even part of plan to eventually "solve all issues" by the time camera truly ships.
 
This + the fact that @Andrew Reid had to use a formatted card after every "reset" might point to camera reading the contents of the card with time stamps to know if there was an 8K / 4K HQ etc. recorded recently.
 
I wonder what happens if you record 8K until camera overheats in one R5, then insert the same card into a different R5 ... if the code is this flawed (quite possible, since it looks to be a last minute thing) – the fresh R5 might think it is overheated without ever being powered on.

A1ex is a legend I swear. That guy should replace the current CEO at canon