[et2o]

> Hypoglycemia becomes symptomatic long before blood sugar is low enough to result in death or serious debilitation and T1D patients know their symptoms well.

Often times in an acute setting, yes. However patients who have had diabetes (T1 or T2) for a long time often lose a lot of their hypoglycemia sensitivity and symptoms. It's not nearly that simple.

[Jarmsy]

Hypoglycaemia during sleep is the big one. My hypo sensitivity isn't great, but if I'm awake I'll always notice before it gets really dangerous. Sleeping is a different story though. The days when even a slight low would jolt me wide awake in a sweat are gone though, and now I'm much more reliant on sensor alarms to not just sink silently deeper.