This article leaves us hanging; the initial motivator for developing the system is to prevent instances of overnight hypoglycemia - but we reach a conclusion talking about how it can autonomously deliver insulin to correct for hyperglycemic events. Were they ever able to make the algorithm robust enough to predict low blood sugars in the future and "shut off" or reduce delivery of basal insulin to mitigate these events?

New pumps by Medtronic are equipped with an auto-off feature that suspends insulin delivery if the user's blood sugar is below a certain threshold [1], however this is a rear-facing indicator and the patient will still experience a hypoglycemic event.

I assume the next logical steps towards making these systems fully autonomous is to remove the idealogical separation of basal and bolus insulin; instead, the system would register increases and decreases of blood sugar and take systematic steps towards bringing them back into a healthy range - much like a healthy pancreas does, either by increasing or decreasing the amount of insulin being delivered at a given time. That way a patient can eat, exercise, and live a "normal" lifestyle while the pump takes care of delivering the correct amount of insulin.

[1] http://www.medtronicdiabetes.com/products/minimed-530g-diabe...