beneath the invective there is an interesting point.
look at the context. its easy to understand in todays environment why someone would write a somewhat-finished personal project, put it on github, and try to get it noticed. personal itch, self-teaching, self-marketing, etc
whats less clear is how you get together enough time and bodies to spend the substantial effort to make something well documented, tested, and more broadly useful. especially in a lesser-used language.
open source has definitely 'won', but i dont think that issue has been adequately tackled. the story seems to be that you get to step #1, and get enough traction that you can hopefully build a functioning set of contributors.
[as aside lisp also has a reputation, unfounded or not, for encouraging people to develop a bespoke private universe thats hard for other people to get a handle on]