Agreed. A sad amount of the history of Unix has consisted of gradually migrating ill-advised solutions made with text-pasting preprocessors to more sensible des

Agreed. A sad amount of the history of Unix has consisted of gradually migrating ill-advised solutions made with text-pasting preprocessors to more sensible designs. See the Bourne shell (written in Bournegol), autoconf (written in m4), troff, sysvinit, etc.