I think a big one to me is when the world doesn’t revovle around me, when things happen without player input because the player isn’t the centre of the universe. Every NPC just wating in stasis or walking on a preset loop forever until I hit the next event trigger really kills immersion.





Off the top of my head:
To a much lesser degree cyberpunk (and I would suspect fallout 4) with the correct mod sets can have the NPC factions carry out battles and limited warfare without any player intervention.