Earlier quoted context omitted.
Really... I wonder what the spare cycles are doing, whether it's truly waste and bad coding or if it's doing some kind of sophisticated predictive algorithms that we're unaware of. I do try to assume engineers did something smart, maybe there's a good reason... I really hope the reason isn't "so we could run the mainline linux kernel" or "because we needed a RTOS" or something similarly bloated.
There is tons of human value in doing things good enough rather than perfect. Why implement quicksort when bubble sort will give you the result you need just as "instantly" and be easier to verify? Why bother procedurally iterating line by line through a 1GB of text in python, when you can call f.read().split("\n") inside a list comprehension and probably have it run just as fast because you have a 64-bit 4Ghz supers…
I think I am thinking more specifically about the flight feedback example compared to what you are describing, but I'm definitely all for using cheap powerful ARM chips in place of obsolete stuff. I'm just hoping that most of that spare computing power was used for something cool and not just spinning the wheels.