THey do have their time and place, I think.
I have used them minimally with my first 2 children, the third just wasnt' interested.
For example: nursing in the car, when baby is freaking out screaming, and you don't want to (or can't
) get back there to pop a bub in their mouth, you just give them the binky and pray that it lasts long enough to get you to where you're going.
Or: late at night, you and dh are getting busy, baby is next to you, wakes up, pop in the binky until you finish, then give him/her the bub.
Other than that, for us, seems pointless.