A library's mission is to be the fastest and most reliable source of information for anyone. Most people believe that this is what Google is but it is not. While Google may be the fastest source of information, it is far from being the most reliable one. The world's knowledge doubles every 13 months on average and is expected to double every 12 hours within a decade (see: "Knowledge Doubling Curve" and "The Toxic Terabyte"). The majority of this exponential growth of information and knowledge takes effect in open access and it is bound to accelerate further as governments make their push towards open access publishing of all taxpayer funded research works. So, with new knowledge growing that much that fast and most of it in open access, a library can't be up to date without it!
The main challenge for most librarians is one of mindset as most of the content offered by libraries is in closed access format. That is to say, most libraries provide access to subscription based databases loaded with copyrighted journals and articles. Yet, at least one third of all articles being published nowadays are in open access. Thus, a library that provides only closed access journals is missing on one third of research content and such a huge number of open access journal articles is simply too big to be left out.
Global eJournals Library
A discovery platform to 9 Million Open Access Journal Papers from 22,000 Open Access Journals
Those who believe that finding Open Access Journals on the web is easy, have never tried it themselves...