And to that I point to cars, devices that also have millions of lines of code (some luxury cars apparently have 100 million lines of code) that drive security and safety critical systems. They are also an amalgam of far far more parts and chips than any phone is.

But here’s the thing, the complexity isn’t even relevant, the thing that would make phones last for ages is just committing to some basic set of hardware interfaces. You can pull an ancient desktop out of your basement and run the latest Linux on it and you ought to be able to do that with phones too.