What's so wild (and a little disheartening) is that the omnipod is a disposable device. Use it for several days, and throw it out.

This is an extreme corner of quality/cost/reliability optimization. The delivery mechanism has to be extremely repeatable and reliable, it has to fail in safe ways, but at the same time, it has to be cheap enough to throw away.

Durable pumps are all made with very expensive precision mechanisms, lots of metal and high quality plastic.