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FreeBSD Just Removed The Last Of Its GPL-Licensed Code
(hackaday.com)
This is a most excellent place for technology news and articles.
What is the practical difference between code not accepted and code hidden?
You can look it and go "yeah, it is shit, but I see what it is doing, it is better done like this" and push that upstream. Saves time reverse engineering.
While someone can, in practice that doesn't happen in most cases
Does happen though. Better to have the option and not often use it, than not have the option at all.
The practical difference is that the code is there for whoever wants to use it.