The devices being discussed are not switch or outlet devices.
I agree
Yes if we are talking about the Molex device that ends up with 3 NMs connected to it. (In, Out and Tap)
Is a device that allows two conductors to be spliced a tap device?
In my opinion no, they would not be tap deices.
334.40(B) only permits their use where the cable will be exposed or in existing installations where the cable is fished
Precisely, that is what I have been trying to get across.
Bob