I’m pretty sure Google indexing pages from Anna’s archive would only get metadata, because AA doesn’t have the full text of the books on those pages. I think to get the full text you have to download the torrents, and I don’t think Google was doing that.

> I personally don't see why one would ever want personalized results.

The same short combination of words can mean very different things to different people. My favorite example of this is "C string" because when I was a kid learning C I was introduced to a whole new class of lingerie because Google didn't really personalize results back then. Now when I search "C string" Google knows exactly what I mean.

I won't bother defending Google-style personalization as it exists for their search results, but since collisions in terminology across fields are common, it's not that hard to see how actual, thoughtful personalization could be useful. Someone searching for "Kafka" is going to want very different results based on whether they're thinking of software or literature. Opinions may also differ over the usefulness of sources, even for people ultimately interested primarily in facts; I find Kagi-style personalization (make your own domain list) very useful, but across Kagi's userbase Reddit is simultaneously one of the most lowered, most raised, and most pinned domains: https://kagi.com/stats?stat=leaderboard

Location based personalization is pretty useful - if I search for 'Bob's Discount Linguine' I want the one in my neighborhood.

Lots of niche things (like programming) also reuse common english words to mean specific things - if I search e.g. 'locking' it's nice to get results related to asynchronous programming instead of locksmiths because google knows I regularly search for programming related terminology.

Of course it's questionable whether google does a good job at any of this, but I absolutely see the value.