Well it may be the case that it's not recommended for production, I don't see a problem with using it for personal use. 1-user only stuff. I fully understand the server is not meant to scale.
I for one am developing a CalDAV/CardDAV server, and I will totally include a launcher for this. Makes for extremely easy evaluation of a product. Because it's relatively a bit difficult to setup a server, I'm worried I may miss potential users because they're unable to get over the initial hurdle.
But if they have a running server this quickly, they may be more inclined to invest the time to set it up properly, with a real webserver.
If there's indeed a difference between the built-in webserver and other sapi's, it should be relatively easy to account for this.