Frequent conversation:
"oh you have a smartwatch"
"no it's dumb in all the right ways, which is the point"
Notably I have notifications but can't act on them, which prevents me from picking up the phone just to check notifications and then be drawn into doing actions. YMMV.
Not necessarily. My smartwatch is basically a beeper. I see messages come in, then I mentally prioritize them. 90% of the time, it can wait at least an hour, maybe longer. It's conditioned me (and people around me) that instant reachability is neither necessary nor desirable. It makes it easier to focus on what's in front of me instead of constantly tickling a slab of glass.
As for the watch, I look at the thing and immediately can classify as truly urgent, needs immediate action or non-urgent and leave it piling as a todo list.
As a consequence I've begun to regularly forget where I put my phone, which is honestly quite liberating.
I've also started to aggressively cull away badges and notifications privileges from many apps.