I think it is more likely a combination of massive cock up (and maybe more than one) as well as a bit of cripple hammer.
Truth is they might just have made TOO good a camera for video and thought that it might kill some of their "proper" video cameras and the premium those bring.
EOSHD testing finds Canon EOS R5 overheating to be fake, with artificial timers deployed to lock out video mode. In this test, we will probe my Canon EOS R5’s actual internal temperature in Celsius, as reported by the firmware.
This week CDA-TEK and I are developing an Android app for the Canon EOS R5, which connects to the camera via the Canon API...
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Joris Maas Visuals reacted to noone in EOSHD testing finds Canon EOS R5 overheating to be fake