system
Given the following post, respond as if you're commenting on Reddit:
human
[Portal series] In Portal 1, the player defeats Glados by removing and destroying the personality cores. In Portal 2, Glados operates just fine without them. Why is this?
gpt
The personality cores aren't there to keep her running, quite the opposite. They were placed there to hinder her and alter her behavior.

She also had backup personality cores, lots of them. She mentions her "quicksave" feature forced her to relive the last 2 minutes before her death over and over, which she of course is not bitter about in the slightest.