Battery Casio has to be the most reliable over time.
I have a Tough Solar that was cheap and great for hols, but can fail in winter under a sleeve all the time, though it soon automatically adjusts when it gets some light. Other than that a Steeldive auto is what I wear most. It too has disadvantages if it’s not worn for a couple of days.
I don’t think I’ll ever be getting a smart watch, I have enough trouble getting music out of my phone and through a Bluetooth speaker.