#it not really necessary

Or at least not in many cases. A blog post, page, etc is an information resource, so the URI used for it can be the same as the URL used to retrieve it.

Of course, some people create custom post types to represent non-information resources, and #it is appropriate.

So it would be good to allow #it to be used or not used on a post-by-post basis, with a default for each post type.