I stumbled on this thread and need to give my opinion: The human NPCs will be the death of this game in the eyes of many.
They overpromised early on, likely when they were inexperienced in proper gamedev, and as a result have promised a system which no sane professional would touch with a 10 foot pole.
To summarize:
The NPCs would not only need to have the human logic the player has, but also have complex logic such as faction alignment, and loyalty (as they promised that fights could break out in groups and so), family units and relationships (they said there would be quests involving loved ones, which when combined with world persistance means keeping track of relationships.
They would need a level of responsiveness; Them being vague left most of the fanbase have expectations raging from survivors of some fuckery having the ability to realise you put bleach in their food and turning agressive on you, which is doable if they make sure to think of edge cases, to straight up procedural dialogue, cleverbot style- which is unlikely to happen, as a rando NPC #12312/9213849238 having a full on neural network, and as I have found a post of higher-ups being asked about chatGPT and giving the usual commune poet suddenly-180d-on-automation response that they will be using writers. Which now means a database of responses which would need to be fluid enough to feel human.
There would need to be quests which don't feel skyrim-y and actually have a story element. See above as to why that is hard. I fully expect "HELLO PLS RESCUE <INSERT NAME> (S)HES MY <INSERT ROLE>" *fuckoff random map marker* to be the actual implementation which they will have to somehow make more "fuzzy"
as human language can be affected by generation, location and personallity.
AND THEY HAVE TO DO ALL THAT WHEN EVEN THE BEST AAA IMPLEMENTATIONS OF NPCS ON THE MARKET RIGHT NOW ARE MOSTLY GENERIC NPCS WITH SOME SCATTERED SCRIPTED ONES.
Do you see the issue here? They would have to put in an immense ammount of work, which would eclipse the whole game so far.
They promised effectively real humans, if we take the UAE definition that made sophia the robot a human by law, and are realistically only capable of implementing the superb survivors mod with some more polish.
Think of all the people who got overhyped on the NPCs and bought the game expecting them to be as good as their imagination.
The difference between promise and delivery will hit like a truck.. And they know it.