A CMS will only allow content management to continue, not site development, additional pages, etc.
What would solve this (and maybe some other) problems would be a feature in RW that allowed one to “package” a project — similar to the packaging abilities of InDesign or Affinity Publisher for their publications.
That is, gather in one folder the RW source file plus all the assets — or at least a list of them — needed to recreate the project. No proprietary assets need be copied, just the project files and a list of the needed app, plugins, themes, stacks needed.
Now there’s an idea for Realmac and/or Addon developers!