Speaking as a Diabetic- yes I do.
I wear an infusion pump already. And a continuous monitor. They're plastic screens and buttons I clip to my belt. They have to be easily accessible because there is so much variance day-to-day.
Having everything talk via ANT or BT or something. Having one controller for it all. It'd be wonderful. I think your point is that it's too dangerous to put all that burden on a single piece of commodity hardware. And that's a valid point, in theory. But in reality, if I can replace the pump UI and CGM UI with a phone **that I'm already carrying** I end up with a whole lot fewer widgets to keep track of. Also, by virtue of commoditization, I could replace the software stack infinitely easier than a purpose-built controller, Dangerous? Sure. But understand the position we're in now:
- Taking too much insulin is deadly.
- It's easy to take too much insulin.
- Since 2009, pumps and CGMs have been available in much of the world which automatically stop delivering insulin when your blood sugar is low.
- The FDA has not allowed this technology in the United States.
I don't care if it's dangerous or voids the warranty or puts the FDA boogey-man on me. If a development like this occurs in the future and the FDA impedes it, I would like the opportunity to get it. Running on an open stack, even a quasi-open stack, is the only viable way for that to happen. And for today, smartphones are the best way to make that happen.