Board Thread:General Discussion/@comment-25877059-20150630023513/@comment-25771725-20151102023400

What makes nen stronger is the resolve. Vows and limitations are just a way of showing your resolve. That said, there never was a limit of what nen could or couldn't do, they can create sentient beings, predict the future, bend the laws of physics, and make a game like Greed Island with nen. I doubt they think there really is a limit to what you can do with nen, they probably just don't want to make the necessary sacrifice to get what they want.