I’ve had a watch for years and never used sleep tracking. I’ve been using it for about a week now and I gotta say, I’m pretty sure I F$[|{!n6 hate it! I swear I’ve been sleeping worse since wearing it to bed and like you said what do I really need to know that info for?
I just got a new refurbished S8 from Amazon so idk if it’s because my battery health is 100% but so far I’ve been going 27hrs and still have 38% and I’m running iOS 10.1