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The example is indeed two years old. I also couldn't find any point in the article that explains why this is worth doing.

But it's a valid example, isn't it?

Someone just wanted to share their Rust + JavaScript knowledge with people, and they got a cease and desist. It's clearly not ideal.

Given they did not change the name, it suggests the legal challenge had failed. So why do we care?

Legal risk alone discourages people. But also, I don't really care.