Full boolean operator search with "literals" actually respected, negative search terms worked as advertised, etc.
None of that ever worked properly, consistently, at google.
My experience is it worked pretty well on Google for a while, but then it got progressively worse.
I fucking hate we now live in a world where leading companies A/B test precisely how much they can degrade their core product value and annoy users knowing they're safe from competitors because startups know if they threaten Google/Amazon on that stuff they'll just put back the minimum functionality long enough to ensure the new player dies.
For example: Searching on "python" would give you two obvious clusters one for "reptiles" and one for "programming languages". Clicking on the appropriate cluster would screen out all the irrelevant ones.
This is a feature still unmatched by any search engine today.
I loved the chaos of Yahoo answers.
I remember messed up questions like “Can humans get preggo from midgets” and things of that nature.