> I don't understand how so many app writers have never gone for a run through a canyon or flown on an airplane.

In the UK, every time I got on a train, I'd experience that. And it was worse than not having internet; you had internet, but with extreme packet loss and instability, meaning that every app out there would simply stall, even if it already had the data to do whatever it is I wanted it to do, because it was waiting on some background request to complete. And because I had internet, the request didn't just fail, but it also wouldn't complete in any reasonable amount of time.

Very frustrating.