&gt; This was the first thing I noticed as well. I mean, that&#x27;s from an age where Java and C++ libraries, frameworks and build systems were nowhere near as advanced as today.<p>&gt; Scheme has seen little investment in their infrastructure and ecosystem in the past 15 years, whereas C++ and Java have seen millions of dollars and many man-years invested in libraries etc.<p>I think that 15 years ago Java and C++ had more libraries than Scheme and Common Lisp, and that even with millions of dollars invested the infrastructure around Java and C++ isn&#x27;t nearly as powerful as what Common Lisp provides in the standard.