LLM search will be ruined the exactly same way, just faster. Google search used to be good, until the company concluded they will earn more money by making it crap. Then it took some time for it to get worst, bit by bit.
With LLM, the same company will learn from previous experience and make it worst faster. It is exactly the same company, making exactly the same product (search), with exactly the same management and being subject of exactly the same market forces.
The result will be exactly the same, they will just get there faster.
I doubt it'll be ruined the same way. It's already got features traditional search engines never really did for us in Europe. Every search engine will assume that I want to buy things from websites that are either in Danish or in English and even if I try to configure something like Google to understand that I'd rather buy from Germany or France than the UK it just doesn't seem to get it. With LLM's I can search for shops on all sorts of EU websites, which comes in rather handy when you're buying vintage blood bowl things since there are a lot of local "ebays" in Spain, Italy and similar that I'd never find without them.
I have no doubt that Renault could pay ChatGPT to get it to recommend people buying lunch boxes. For all I know there might be a bunch of eco friendly "European produced" lunch boxes with compartments and the LLM recommended me the three which fit the needs I described because those companies paid for it. I didn't find any of them on Google though, that was all Temu resales.
With LLM, the same company will learn from previous experience and make it worst faster. It is exactly the same company, making exactly the same product (search), with exactly the same management and being subject of exactly the same market forces.
The result will be exactly the same, they will just get there faster.