I use “alternative search engines” daily. However, I have to crawl back to Google if I want to find things that were published in the last two weeks. Even Microsoft Bing can’t keep up with all the content that appears on the web every day.
Also, there are Google search-proxies like startpage.com
site:news.ycombinator.com in google.com About 11,90,000 results (0.25 seconds)
Kind of frustrating :-/