The only thing an Apple Watch would not give me out-of-the-box that a dumbphone would is the ability to have a private-ish conversation. But ... airpods are a lot smaller than any dumbphone, so there's that.

I am actually thinking I might pick up an LTE apple watch in a couple months when the next generation comes out, exactly for the reason of leaving my iphone at home pretty often. Less distraction, less willpower required to stay off it.