- search is a commodity for licensing (making them resistant to launching a "cleaner" engine that would alienate their clients)
- what worked for a smaller internet (100 million pages) could scale appropriately with the growing internet (100 billion pages) without rethinking everything
- "Page rank" only helped relevance (it was also about spam)
I think Google is stuck in a rut of their own right now. Here's some faulty assumptions I think Google is making:
- users always want faster, more direct answers (rather than controlling the filtering/categorization of their searches)
- users want Google to predict what they mean rather than clarify what they mean
- algorithms > human decisions