Huh. I read about this problem with framerates. So, it's a game that can only run on very high end PCs, but if your PC is juuuust too good, the game is also broken ?
Seriously, have you seen the minimal config for F76 ? Quite impressive. My computer, which is alright for today's standards, can run Witcher 3 and Rise of the Tomb Raider at 60FPS, no problem, but it simply cannot play F76, a graphically mediocre title with zero scripted NPC on screen ? Optimization my ass. I'm not surprised though, Fallout 4 is the only title I refuse to launch during summer, because I'm genuinely afraid of my PC parts getting too hot.
For Pete's sake, the trailer had massive framerate drops (15 FPS max at the scene in the silo), and these trailers are made on post-production computers, aka PCs at around 5000-7000 Dollars minimum, with more memory than a Kwisatz Haderach on crack.
No wonder why there's no NPCs. Can you imagine NPCs scripts packages running around while you play ? Your computer would melt. It was what consumed the most memory in Skyrim, and it's the same thing today.