There are also tons of ego websites that aren't going anywhere from what I can tell. Tiktok will still be around unless it gets banned, and something else will pop up behind it if it does.
The LLM relies on free access to that writing in order for it to be informed about current events. The news publisher relies on readership to pay writers. If LLMs are too useful to the point that people rely on them alone for news, then ironically they will become worse products over time as the publications they draw from go out of business.
Nobody is forced to use a search engine. It's just the best way to interact with most of the web. I'm sure there will still be people who want to sift through raw data, which will increasingly be created for consumption by LLMs versus humans, but that's a niche.
Google should be deathly afraid of this. Not because Microsoft is going to replace them with Bing. But because, GPT is going to be in every major software product that's connected to the internet within a few years. By the end of the decade if not sooner agents powered by LLMs will be the primary mode of interacting with the internet. Going to Google.com or whatever to search for an answer is done. You'll just ask Siri 3.0 and the answer will be good enough.