Who Needs Zettelkasten
At first sight, it may seem that zettelkasten is only useful for writers and researchers.
In the first row yes, but in general it's useful for any knowledge worker. Zettelkasten is [[second brain]] that leverages learning, thinking, and creativity and also allows to seamlessly build a foundation to share knowledge and experience in publishable form.
That's how zettelkasten is usually being sold.