In the EU at least that would be illegal - you can't void an entire warranty, only relevant bits.. and since windows doesn't have a warranty anyway..
The canonical example is you can't void the warranty on a car engine because you changed the stereo. 'Doing x will void the warranty' is almost never the full story.
LLMs will eventually start feeding of search results from other LLMs and they'll just start regurgitating each others nonsense. If that isn't happening already.
Nobody is going to point an LLM at a good data source because that would mean spending money on actually useful stuff not fast cars and booze.