It's a really awful name. Is primitive obsession a good code smell or a bad code smell? And if code smell is a bad thing, and if primitive obsession is a good thing, wouldn't the code smell be lack of primitive obsession?

I don't mean to be pedantic. But it's quite exhausting trying to parse the meaning out of "primitive obsession is a code smell". It took me a while to figure out whether the author considered "primitive obsession" to be a good thing or a bad thing, not least because the they provided an example but not a definition.