A trope that comes in many forms ‘Inside a computer’, ‘Brain uploaded’, ‘Your Mind Makes It Real’, essentially person stuck in/ plot takes place in virtual world. In my mind at least it’s just ‘it was all a dream’ with a chrome coat.
Especially irritating when it’s the big plot twisty, instantly takes me out of it, and spoils everything established. Makes everything feel a bit meaningless no matter what - since now there’s a that big ‘it’s a program’ sign with all its implications hanging over it now.