I think you're correct, and Nginx does a nice job within that scope. I decided I wanted to learn it a bit, so I picked it for a project. I hadn't even stopped to think that I was reliant on WebDAV for editing that static content!

Long story short, I decided not to use any of the partial WebDAV implementations for Nginx and just use sshfs instead. It's so true that Apache is a swiss army knife, though.