Comment by lock1

Assuming you're referring to a "smart computer opponent", it's probably a mix of many factors. Indie gamedevs usually won't have the resources to implement cutting-edge technology; they just go with whatever standard gamedev toolkit supports and focus on the gameplay, story, art, or other aspects. Even a studio with the resources to do so might struggle to find where it should fit into the gameplay.

Contrary to what gamers usually think, making an impossibly difficult computer opponent is trivial. Give a Counter-Strike/Valorant/FPS bot a wallhack & aimbot and everyone will compete on kicking each other in the match rather than playing the game. Making a computer opponent that's fun to play against, on the other hand, is hard and not even a guaranteed hit for the game.

I don't think current "AI" could do well in standard video game context. It's way too computationally hungry for most of local machine and it's probably hard to "program" it the way game designer envision it to be.