Here is another Canon EOS R5 review, not pushing the overheating hysteria but comparing the R5 to the Sony a7R IV for still photography.
The EOS R5 seems to be a remarkable and highly regarded stills camera. In particular, the autofocus system is a huge leap forwards. More Canon EOS R5 review stuff is listed here, for the EOS R6 see here. User manual are available for download for the EOS R5 and the EOS R6.
Canon EOS R5 body and kits preorder links: