Help on Atlas App Services deprecation & migration

I have a web app that uses Atlas App Services exclusively as the back-end. I’m using:

  • Atlas App Services user management and Authentication (email/password)
  • Rules for data access (role based permissions)
  • Functions, called directly from the front-end JS

Having read through all the deprecation information a few times, I’m still confused. Are MongoDB basically removing the ability to use Atlas as a standalone back-end?

Are all three of the above features being deprecated?

If so, will do I have any option other than running my own back-end server, in particular to manage Rules? At the moment, my documents have an array field containing userIDs that have permission to read them, and I have a Rule within Atlas App Services that only allows those users to return those documents. Will these Rules disappear, meaning I need to implement this logic in my own back-end server? Does this increase the data security risk because I need to be sure that my own server, and the way it interacts with Atlas, is completely secure?

Thanks, Dan