[NepNut]

What I know is some nep is sensitive to root bound like N. bicalcarata... the plant will stay small if the pot is small.

For most nep, I don't find it as sensitive. I also found smaller pot will tends to dry out faster hence promoting the formation of basals. Other than that, IMHO as long as it's proportional to the size of the plant, pot size it's not that crucial to the well being of the plants when compare to other factors such as amount of light, type of media and watering frequency.