It conjured up images of suffocating someone with a pillow, while they run a marathon in the desert. Pis get pretty warm, I haven't looked back at my B+ for a while but I don't think it was a heck of a lot cooler than the more modern devices.
The recent models do get quite warm, especially Pi 4, but the Pi 1 with an overclock has not gone over 50C in this setup, and that's at a constant 100% CPU usage.
That's a very reasonable temperature I'd say for 100% usage. When I was running a Pihole; I don't recall if it was on a 3B or 3B+ but it would idle at ~55C.
This gives me an idea; I might see if I can run some thermal testing on all of the Pis I have using my Flir to get some thermal images and put together a little write-up.
I've done a bit of experimentation previously when I'd build a little 1U server case with 3 Pi 4B in and added a custom fan controller (using an ESP32) to stick in my network rack, and it was running Kubernetes, but I didn't keep it long.
Nice; my experimentation was actually before this (and I posted it to the RPi forums), the firmware updates _did_ make a measurable difference but I decommissioned the setup shortly after testing it.
EDIT: What that post is missing, is a comparison of all generations of the Pi; We know the Pi4 is hot, but I haev every previous generation sitting in the drawer, might be interesting (for me at least) to do some comparison.
My RPI4 sits in a closet. 67 max temp, usually 57. I got the heatsink-enclosure. And I haven't myself made the firmware update - I may still have the bad one.
