The Gas-One 3900P has a heat-conductor plate that transfers some therms from the burner area to the fuel cylinder area. At least for this model, the manufacturer seems to be aware of that.
Regardless, my wife was keen to buy the propane adapters - "It's good to have options."
I agree with your Wife. We have an older butane portable stove. How does the adapter hose hook up to the Gas-One? I'd buy an adapter if they make one.