GURPS Space question

[awesomenessofme1]

Originally Posted by David Johnston2

Two words for you.

Nitrogen narcosis.

It does help you by giving you a net +1 habitability but human lungs aren't really designed to handle nitrogen under that much pressure.

I'm not sure you understand what I said. It doesn't improve habitability. As written, Very Dense plus Marginal (Low Oxygen) gives 1/4 hab points, while Very Dense plus no Marginal gives 2/4, despite the former being objectively better for human habitation.