I've never found a compelling use case where I'd willingly buy another Apple watch.
Integration with Fitness on Apple TV is extremely slick for HIIT and yoga.
Also, the third-party Intervals Pro app has been my go-to running app. I started with Apple+Nike since 2010 and a Fitbit Charge in 2015, but nothing let me customize my workouts as much as the Intervals app.
My watch is essential in helping me keep up. It’s on my wrist from the moment I wake till the moment I sleep, ensuring I miss nothing important. I’ve restricted notifications to medical needs and use it to log symptoms or adverse effects immediately, preventing forgetfulness which was a problem previously.
Outside of my unique use case, many people I know with a watch have stopped carrying a phone altogether. They find it freeing, as the watch gives them essential tools without the distraction of a larger device. Its limitations are a benefit, allowing them to focus on the moment and carry less.
RE not carrying a phone, I think what mostly makes them something people need to detox from is notifications and social media fomo. Take those away and it's just a pocket computer.
For that reason I've leaned heavily into Focus modes and limiting notifications and have left most social media. Those have really helped a lot with being present.