Hackers usually work alone or in very small groups, and the tools they need are usually handcrafted. They do not need corporate-level software, and long do they strive to be left alone, without being bothered.
Perhaps the reason this only ever ends up being managed by one or two people is that >2 people simply do not need to manage the fussy details once they've been abstracted/normalized out.
Also, I lurked in comp.lang.forth for a week or so a while back and learned that Mattel were using Forth as a runtime for their toys back in 2004, at least: https://groups.google.com/d/msg/comp.lang.forth/omi6PUvymEE/..., https://groups.google.com/d/msg/comp.lang.forth/LzOasFOyIMg/...
But also tons of official projects in the enterprise. A company needs an X tool, Y is known for his capacity to deliver, they get assigned to make the tool.
Not every project requires a team.