I still get a thrill from flying, something like 45 years since my first flight. Up to 2019 I was traveling frequently for work, a mix of long haul East/West and also Europe/Scandinavia. My philosophy was always to be in possession of a piece of paper to facilitate access to the aircraft.
Now flying is almost exclusively for leisure reasons and last week a short hop to London in the back of an A320 saw the camera out, the link below takes you from the end of pushback to climbing out from Runway 34 in Aberdeen if you are inclined to view. We did rely fully on the electronic boarding pass, screenshot of the boarding pass app image/phone screen rotation turned off and all worked well.. I suppose a battery or phone failure would be dealt with in the same way as a lost or damaged paper boarding pass.