Indeed, the original work done by single dev (Igor) to get the nginx project running was very impressive timewise, and as a volume of code produced. I can't really recall why he left, but with other comments around the thread implies such forks have happened more than once.

As a sidenote I believe the people who start projects that they themselves run in excellent manner, should be praised, supported, noted and there is nothing more for their identities to matter. It very much matters some particular person with weird nick burntsushi created this wonderful tool rg, and kept growing it for long time. Besides, I can bet for projects such as Cosmopolitan C, it absolutely matters that jart started/did it.