That's interesting. There's another comment further down saying it broke stuff too, but I've honestly never had that happen. The most I've ever seen it "break" anything was formatting issues when people didn't declare the ad div size.
To be fair, we're very light/casual web users as most of my hobbies/entertainment are physical electronics and my wife/kids mostly watch Netflix/Stan or just browse reddit/news sites.
I'm sure there's plenty of stuff it breaks (due to how it works and how complex modern sites/web-apps can be), I've just been lucky that all of the sites we use seem to work fine.