Mods, you know the ones on nexus. There were many of them and i right now without thinking tel you it was hardcoe mod and throwing weapons other ones werent that significant and i dont remember all.
Throwing weapons were in all the older Fallouts, and was demanded back by old-school players like alot of other things. hardcoe may have been a mod before aswell, because a lot of people thought Fallout 3 was too easy (it really was, I die all the time in NV
) and that's usually when mods evolve, when things aren't to the liking of someone or some people with modding skills, and a demand for it. But the demand was not only shown in mods, I also saw alot of people who suggested that on the forums during development aswell like "make stimpaks not heal crippled limbs and not heal instantly, makes battles far too east, you just have to Hotkey stimpaks" and "ammo should have weight, it's weird that you can carry around thousands of rounds of each caliber and they do not weigh you down" and "we're in a hot desert, drinking should be necessary". That, along with DT made the game harder and better imo.
Mods that Obsidian saw, liked and put in are the weapon modifications, which they even said they got the idea by from mods in an interview.