Or Google simply could not keep up with the pace of web growth. The web is already 100x bigger than it used to be 10 years ago and the external environment is a

Or Google simply could not keep up with the pace of web growth. The web is already 100x bigger than it used to be 10 years ago and the external environment is actively gaming with Google (SEO, Spam, etc...) while the information available from a user query is still effectively same. Personalization may add more implicit information to a query (e.g. If you're tech-savy, then a keyword "Rust" more likely means PL than game), but most of the time it lacks the actual context so its usefulness is somehow bounded. Most of the useful information still comes from a query itself. Hopefully, advancement in the field of NLP may allow a longer query to be more effective but I don't see any straightforward way to keep the search quality with a 1~3 words query.