Were already seeing a drop in product quality and reliability. Just try a search engine for practically anything. Chances are you already type "wiki" or "reddit" or "Lemmy" or whatever along with your search terms. AI(LLM) is just advanced cargo cult development. It won't translate to physical design even though that's being pushed by management level and marketing. Products will stop being useful altogether.
That's on top of the tailoring to business and wealthy class as others have argued here. But even that will have to endure enshitification. Ultimately the wealthy will pay for labor on their toys(they already do, we just can't afford those).