A lot of people are going to use Google as their search engine, and they may not even consider using other models. However, it is important to remember that there are other search engines out there, and that they may have indexed information that is not available on Google. Google may be the most prominent search engine in the world, but it is not the only tool for people to use to access information.
It is also important to realize that even Google can be streamlined. Lots of people will conduct straight Google searches. They might be better off trying to look on Google Scholar if they are interested in academic documents. Going on Google Books can help people get a sense of the published literature on a particular field. Google is going to link people to so much information that it is often better to try to limit a good portion of the information that is going to be made available.
People who are trying to do in-depth research should consider the possibility of consulting with other search engines if they really find themselves unable to find all of the information that they need. Some people use other sources when it comes to indexing pages, especially because there has been something of an ideological backlash against Google in recent years. Internet research is all about knowing where to look and how to narrow the endless supply of information down to the most useful pieces of data. In other cases, people will have to widen the search.