As far as I could tell, it was just a way for me to use the ridiculous number of radiation, health kits, and food you got in the game. Even drinking water wasn't a big deal because hey, you could just use some RadX and be fine. It never added any moments of tension for me. It was also supremely annoying without an extra mod that required installing a script extender, in order to see your hydration and hunger levels on the HUD and not have to go into the Pipboy every single time. It was just stupid, EXCEPT for the fact that healing was over time, which I thought is something that should be in the regular difficulty modes since insta-heal by going to inventory is silly.