I use STL now like its second nature. As the Intrusive library proposes to be an alternative to STL for some situations, I am intrigued. I have no background with intrusive containers so I'm not shur why I would use one. I scanned the documentation, and still do not feel like I would know when to use Intrusive and when to use STL. Learning STL is a huge commitement of time and energy, so I think that people might be reluctant to give Intrusive a look without a strong and clear reason why. Here is the introduction from the documentation: *"Boost.Intrusive* is a library presenting some intrusive containers to the world of C++. While intrusive containers were and are widely used in C, they became more and more forgotten in C++ due to the presence of the standard containers, which don't support intrusive techniques. *Boost.Intrusive* not only reintroduces this technique to C++, but also encapsulates the implementation in STL-like interfaces. Hence anyone familiar with standard containers can easily use *Boost.Intrusive*. Like their STL-counterparts, intrusive containers use template parameters to control the stored data types and some special aspects of intrusive containers." This is not adequate for a motivating introductory discussion about why and where I should use boost::intrusive. Give a couple of hello-world motivating examples of where STL falls short and why boost::intrusive is better. Get the reader excited about why boost::intrusive is "cool".