The compass was my most wanted feature for the series 5, I can’t believe it happened.
I use the compass when navigating in the mountains. I use mapping software on the watch to pinpoint my location, then take an approximate bearing and then switch to the compass. I recently tested the watch in awful visibility relying solely on the watch for over 2 hours in featureless terrain and managed without needing my backup devices (iPhone, dedicated GPS unit, standard map and compass) which stayed in my backpack.