I don't think it's that good AI is hard. I think it's that good AI is no fun. You think it'll be fun when you don't have it, but I suspect it's limitations would quickly become apparent if you did.
You go to meet Alladon behind the stables for a meeting about joining the thieves guild but he bumped into Lyanntha on the way to meet you and took her back to his place to show her his etchings. So you sit around wondering where the hell he is for hours.
Dargax the draagon flies away every time you're carrying the sword of IceWand, because he's vulnerable to it. He only stays put if he sees you coming with a non-magical weapon, at which point you've got bugger all chance of beating him and he has barbarian on toast for supper.
Good AI could easily be too good. I'm sure I remember reading about all the AI they had to take out of Oblivion, because it was too good. Like NPC's pickpocketing you, and removing quest items.
You go to meet Alladon behind the stables for a meeting about joining the thieves guild but he bumped into Lyanntha on the way to meet you and took her back to his place to show her his etchings. So you sit around wondering where the hell he is for hours.
Dargax the draagon flies away every time you're carrying the sword of IceWand, because he's vulnerable to it. He only stays put if he sees you coming with a non-magical weapon, at which point you've got bugger all chance of beating him and he has barbarian on toast for supper.
Good AI could easily be too good. I'm sure I remember reading about all the AI they had to take out of Oblivion, because it was too good. Like NPC's pickpocketing you, and removing quest items.