A peer commentator already mentioned this. I already explained:

The solution is to provide sufficiently broad set of tightly integrated base system libraries; there are few, if any, duplicate dependencies across most applications.

-- https://news.ycombinator.com/item?id=5567754

The advantage is that you have broad, comprehensive, consistent libraries that integrate with the base system, rather than a mash-up of inconsistent library interfaces and shell scripts -- for example, see how Linux distributions manage OpenSSL and certificate authorities, versus how OS X and Windows both integrate their crypto libraries into the system certificate stores and UIs.