Blender Apps are on the medium to long term plans for the Blender foundation (i.e. planned on roadmap but not currently under active development). The Blender team currently have a lot of projects on and are resource bound so have prioritized focus on finishing developments such as Evee Next, GPU compositing etc before starting other projects such as Apps.

For more detail see: https://www.blender.org/development/projects-to-look-forward...

Blender is already being used for that purpose, it doesn't have a specific aim, and that is one of its strengths. The question remains: Why would you strip away and partially re-implement all the UI? You never know what your users might have needed that you took away.