Arstechnica has a nice review about Apple Watch 6

As with tracking any health metric, actionable insight and education turn numbers into lifestyle changes. Some fitness devices do a better job of this than others, though, and we’re nonplussed with Apple’s long-awaited foray into sleep guidance. We’re so accustomed to the company holding out on popular features for years with the expectation that, when they do give us what we want, the features are more refined and useful than those that came before them. Unfortunately, with sleep tracking, that’s not the case.

Apple hardcore fans indeed believed that if Apple includes it, it would included better version, but it seems that is not valid anymore

For full version of article:

https://arstechnica.com/gadgets/2020/09/apple-watch-series-6-review-still-the-best-smartwatch-but-tracking-is-lacking/