Scheme is just one standardised dialect, and it's academically oriented. SRFIs are really a pain and many fundamental things like namespaces and modules in Sch

Scheme is just one standardised dialect, and it's academically oriented. SRFIs are really a pain and many fundamental things like namespaces and modules in Scheme have been standardised very late. Thus portability among implementations is hard, but achievable if you stick to the Revised Report and ignore uncommon or all SRFIs. Common Lisp is a different story though, the standard is comprehensive and it's easy to go from one implementation to another, often requiring no effort. In most cases where there's an incompatibility among two Lisp environments, you can just write a macro or two to sort it out, whereas with C, if you don't have a for loop, you either patch the compiler or use the while loop.