I was feeling pretty good about Garmin’s new Enduro watch, right up to the point where the features discussion started. More money than a fēnix 6, but way less features; and the only thing you get in return is massive battery life. I say only, but if that’s your thing, it could be exactly what you’re looking for. Personally, as long as I leave all-day SPO2 off (which frankly isn’t a hard ask), the battery life of my fēnix 6 is way better than I’d ever need, and I love features. But, I also never go off-grid for weeks at a time, or ever really :).
