When do hybrid camera overheating limits truly become dealbreakers?

Hey everyone, I've got a genuine question that's been on my mind. I often shoot with our ALEXA 35 or AMIRA, but for smaller, more run-and-gun stuff, I've been experimenting with hybrid options like an R5 C. I've read a few times that hybrids can overheat during long takes, and while I haven't personally hit that brick wall on my current projects (mainly 30-second spots, music videos with shorter takes), I'm trying to wrap my head around when this becomes a critical, can't-work-around-it limitation.

In what specific, real-world shooting scenarios, and on what kinds of productions, does this overheating issue on a hybrid like an R5 C or even an FX3 truly necessitate jumping up to a dedicated cinema camera like an ALEXA Mini or an FX9? I'm talking about situations where you absolutely need those incredibly long, uninterrupted takes, and a hybrid just won't cut it. Any war stories or practical examples would be super helpful in understanding this boundary. Thanks!