There wouldn't be an "ad" anywhere, though. You'll just ask the LLM for alternative implementations in plan mode, and it will be selling you one of them during the conversation rather than giving you an unbiased comparison. If you become suspicious it will make sure the pros just slightly outweigh the cons, or mention how well the thing works with something else in your stack, or whatever else a skilled salesperson would do to guide your choice without you realizing.

It's already doing this by telling everyone to use React and Tailwind, it's just that nobody's getting paid for it to do that.

> Then SEO made Google defensive, then websites catered to Google and not users,

Google was created in response to simple proto-SEO techniques (e.g. keyword stuffing) that already ruined Alta Vista.

Google has been combating adversarial information retrieval since inception.

Google's background with that is one of the reasons to expect they will stay on top of the AI race. The recipe is: lots of good/novel data x careful weighting of trust x algorithm.