TFA mentions the Sprite operating system, which brought us a few things, including (i recently discovered), pmake[0] (by way of Adam de Boor[1]) which was an early instance of parallelizing make(1), and begat BSD Make[2], which is lovely to use.

[0] https://web.stanford.edu/~ouster/cgi-bin/spriteRetrospective...

[1] https://www.linkedin.com/in/adam-de-boor-4293a1/

[2] https://man.netbsd.org/make.1