A good reminder here for people who don't do lots of activities on their watch and think that we just don't want to charge for a month.

GPS uses battery. So having a watch that can last a month, for us means it will last a couple weeks of constant running/cycling/etc.

This is in stark comparison to a smart watch.

Yup. Many people will never experience this, but an Apple Watch Series 10 effectively cannot track a marathon for most runners. I've heard some people say that if you put it into its low-power mode, it can barely do it, but otherwise you need an AW Ultra, which can record up-to ~8 hours of continuous activity. If you regularly do longer, lower-impact outdoor activities like cross-country cycling or hiking, none of the Apple Watches can really handle it (especially if Apple's future intention is that you'll also be able to rely on it for emergency satellite connectivity; with what battery life??)

When Garmin says that they have a watch that can last 28 days, what that really means is "it could do like 50-80 hours of continuous activity tracking" or "you can easily record a 10 hour hike, and also not be worried that the watch will be dead if you need it for emergency satellite services". That's years beyond anything Apple, Google, or Samsung can do; none of the big tech companies are remotely close to this.