The main advantage of Pebble watches was their battery life. If 3 days works for you then there are more sophisticated solutions out there, including the "Garmin Vivoactive 4" which looks great. I'm personally happy with the 3 days I'm getting out of my Pixel Watch 4. For folks that consider 14 days to be a plus, I'm simply mentioning that, 10 years later, it's no longer a differentiator.
The other big differentiator is the fact that you can do anything on the watch with just buttons. Some Garmins let you easily control music without using the touchscreen, but I think it's just the 5-button ones.
This is great for when you want to give the watch input signals without looking at the screen and hitting specific tap targets, or when your hands are wet/gloved/etc.
