Multi-tenant Capability with Tenant Specific Users

We've read through lots of posts here and have some remaining questions. In the Service Studio help for multi-tenant eSpaces it says, "Warning: The Multi-tenant capability will change in a future version. Please contact OutSystems Support before using it." This is a key requirement for our application and leads to the following questions:
  • What will change and what risk does that create for us now?
  • Are there any good and freely available examples of tenant specific user administration?
  • If we implement tenant specific users will we still be able to use the built-in role based security?
  • When will the multi-tenant capability change?

Thanks for any information that you can offer. If the response is better provided outside of the forum, just let me know.