Canon's General Manager of the Image Communication Business Division Takeshi Tokura was recently interviewed by Toyo Keizai about the success of the R5 and R6. In it, Tokura seems to suggest that 8K was important to include in the R5 mainly to beat competitors to it.
Roger Cicala and the team at Lensrentals recently decided to do a proper heat emission test on the Canon EOS R5. After all the debates in the comments, amateur teardowns published to Weibo, and a whole lot of speculation, LR wanted to answer a basic question well: how does heat get out of this camera... or does it at all?
When Canon released the EOS R5 and EOS R6, they made it clear right away that both cameras were thermally limited when shooting 8K (R5) or oversampled 4K (both) video. But what does this mean for real world use? DPReview has now tested both cameras, and their conclusion is unfortunate for Canon fans who hoped that overheating concerns were made up or overblown.
Multiple outlets with inside information are reporting that Canon is holding back and/or delaying shipments of the new EOS R5 and EOS R6 cameras as a result of the overheating issues that early reviews have been reporting. This could be a sign that a recall is in the works.