Not really "horribly unsafe", it seems that with proper prescreening and magnesium supplementation cardiac risk can be safely managed. I was looking into this a few weeks ago.
However there is certainly a lack of data, and facilities doing treatment now are probably incentivized not to share adverse events.
I think its important to state that "bonk point" is different based on if your metabolism is adapted for carb vs fat burning.
If always training with high carb loads, you will bonk rather quickly going on a long ride without any compared to if you train fasted or more fat adapted.
from the paper: "The consideration of fire ecology data and various factors involved in the complex process of fire ignition, combustion, and behavior, in relation to the GBY paleoenvironment and archaeology, enabled the rejection of recurrent natural fires as the responsible agent for burning (Alperson-Afil, 2012)."
>It's been extensively documented among modern human groups.
Do you have some sources? A quick search doesn't pull up much evidence for current hunter-gatherer dependence on natural fire regime. Or you mean anatomically modern humans?
Not sure that's valid; in my experience Samsung phones are fairly repairable* and have spare parts available worldwide. Guessing Fairphone parts are much more limited.
* probably much more fiddly than a fairphone though