The author is prompt to admit that this is pure speculation on his part, and so we don't know how and why Google became what it is; but I find his explanation very convincing. Serving personalized results to users may increase click-through rates but it degrades the idea we form of what Google is and what it does.
> Serving personalized results to users may increase click-through rates but it degrades the idea we form of what Google is and what it does. If it serves me better results, then how so?
I always thought that search personalization was of course better, until that page made me think about the downsides.