Reserved words for Page URLs? (/users/ won't save)

#1

I’m trying to save a Page with a Page URL of /users/:
image

It looks like it saves, but it actually changes the Page URL to /users-post/

Is “users” a reserved word you cannot use as a URL path?
Are there other reserved words?
Is there a way to “unreserve” it, so I can have the page appear at that path?

(Link to page is:

#2

Here are the reserved slugs that are hardcoded into ghost. You can’t “unreserve” unless you do it for every update

#3

It doesn’t seem like the /users/ slug has any use right now.

Is there something it currently does that I’m not seeing?