@jalefkowit @ajroach42 I assume that it's not just because the developers, including people like us, don't test with 'normal' users (which is probably true) but testing UI for error conditions is very hard - you have to generate the errors on demand and then put in the effort.
Also, the rate of change is such that you don't get the chance to do full UI testing for all new versions.
So we're dependent on developers thinking about this - and most minimise thinking about error handling anyway

@inthehands @jalefkowit @KentNavalesi at the same time as the first iPhone was released, other phones (I worked for Symbian, a now extinct smartphone OS company) came with an extensive printed manual.
To be fair, you could guess most of it anyway but it shows the assumption that any device required a manual.