This is one thing I miss about the old Windows Phones (Nokia/Metro interface sucked, but damn) because it was a phone first, computer second. Most phones these days are computers (or cameras) first, phones last.

For example, the WP would progressively disable things to keep the phone on for as long as possible. At 2am, after a night out, I'd usually be the only one who had a working phone to call a cab (pre-uber days) -- but that was the last feature to stop working before it died. IIRC, you could disable this functionality, but I don't know why you would want to.