"...It's all well and good to have hundreds of devices with your models, software, whatever on it, but if you can't get updates out to it in an orderly time, what's the point? What if you have IoT devices?

What if you have cloud instances?

What if you have all of these and a couple phones in the mix?

How do you go about that? And how do you roll back when it goes wrong?

...And you can't do all of this with one system, right?"