I'm pretty happy with the level of "smart" integration on my Garmin watch. For me, that's "shows me a preview of incoming SMS and Telegram messages" and the contact name when I receive a phone call. Plus the syncing of fitness activities. I do go back-and-forth on whether I want it to buzz or not, but that roughly overlaps between when I'm wearing the watch in the first place, so that has worked out well in my particular case.

It fits well into my general philosophy of smartphone notifications, where real humans are allowed to buzz or make noise (phone calls / text messages) and everything else waits silently in the notification drawer until I choose to look at the phone.