And I think they aren't anymore. But they were back in the day, so for compatibility reasons they have to keep some of them that way. Edit: further evidence: w

And I think they aren't anymore. But they were back in the day, so for compatibility reasons they have to keep some of them that way. Edit: further evidence: when you mistype a name in lowercase such as https://www.npmjs.com/package/aaaaaaaaaabbb https://www.npmjs.com/package/aaaaaaaaaabbb it gives you instructions on how to create the package with that name; however when you do with a name with a capital letter such as https://www.npmjs.com/package/aaaaaaaaaabbB https://www.npmjs.com/package/aaaaaaaaaabbB it just shows a 404