Are there useful heuristics on where GSL is most applicable? Where it is relevant and powerful and not too meta; just the right amount of abstraction to represent a problem and its solution.<p>For example, &quot;GSL is likely a good choice at &lt;abstract problem description&gt;, such as &lt;some very concrete examples&gt;. And it may not be appropriate for &lt;abstract problem description&gt;, such as &lt;other concrete examples&gt;. Because of &lt;some specific reasons&gt;.&quot;<p>I looked through the GSL website and also Scalable C and wasn&#x27;t able to find any descriptions that place limits on the applications of GSL. A description of what a complex something <i>isn&#x27;t</i>, from an expert, is almost as important as what that thing <i>is</i>.<p>Your writing style in Scalable C is incredible and enlightening. I will be studying and referencing that book, even if I&#x27;m not directly coding C.