In reply to ianstevens:
I have a Garmin, and GNSS on my phone. In fact, I've been using GPS commercially since 1986.
However, if heading anywhere remote, I'll back them up with a paper map. And where better to carry it than a thigh pocket? I wouldn't dangle it around my neck in a map case... it flaps around in the wind. In a jacket? Maybe, but I'm constantly layering up and down on the hill, and would have to remember to shift it over every time, whereas changing keks on an outing is a rare event.
Fjällraven keks will still take an OS map, which may be why about 70% of the people I do Endurance events with have them! 😁