Radicale - What am I supposed to do?

So I am following the Radicale docs.

And the first method is this:

as normal user
Recommended only for testing

Okay, I’m not testing, so I move onto the next one:

as system user (or as root)
Alternatively, you can install and run as system user or as root (not recommended):

Okay, so this method is not recommended…

And there aren’t anymore.

So what’s the recommended method for non-testing environments?????