We sure are using more apps than ever. But I think we are also using more "smart" things than ever, and not just in the buzzword sense.

A ton of everyday object now have chips, from toothbrushes, thermometers, door bells, car keys, fire alarms, lights, even charging cables.

Considering drivers are coded for every variations of these appliances and chips, it look to me to be a tremendous amoubt of code written all over the world. Especially as writing code is cheaper than adapting hardware, even different uses of the same chip could get different drivers.