Never got why people actually use those... like it's really that hard to pull out your phone to pay for shit, or the watch you had before didn't have the proper backlight or whatever...
I love mine, since I can control my media with it, see my texts at a glance, and ping my phone when it’s missing. Those features alone make it so that I’ll never want a dumb watch again.
Given that a watch is just always on your wrist it’s easier to carry when going for a run or into a store, while still allowing you to listen to music and receive calls. It also makes it less disruptive to look at notifications. And the payments work without any further authentication as long as the watch remains on your wrist, without fail (at least in my experience), whereas Apple Pay on the phone will ask for the phone passcode every now and then.
Yeah, I had a fitbit smart watch for a while, but replaced it with a Garmin Instinct. Battery lasts for weeks, can do GPS tracking, and show me notifications of apps I choose.
It can completely replace your phone when running. I leave everything at home when I run and use my watch for music, phone calls, and messaging. (I have the ultra w/ cellular)