A developer on my team introduced new features behind feature flags despite concerns about whether we should have those features and how they are going to be maintained. Changes touched 200+ files which is half of the files.
Turns out nobody wants to use them, they caused many subtle bugs in existing features and is a distraction for many things we do.
The developer left the team, and I am left with purging all of this.
Now imagine if he had 100x the speed! I'm sure AI will help him thoughtfully pay off tech debt at his next company!