Their attempts to make their search more intelligent ends up keeping the user from using theirs. Which is practically always a bad thing: Regular users tend to

Their attempts to make their search more intelligent ends up keeping the user from using theirs. Which is practically always a bad thing: Regular users tend to suck at searching (e.g. formulating queries) because they haven't learned it, not because they wouldn't be smart enough or because it's something you need a special talent for.