Why not join with content_model_documentation module

Problem/Motivation

Why not join with https://www.drupal.org/project/content_model_documentation → ?

There seems to be all functionalities already avaliable and you could just join the ER there.
They have some sort of it yet.
But the most interesting part of it is that it generates the diagram just by selecting an entity and the depth of relations.

Steps to reproduce

Proposed resolution

Remaining tasks

User interface changes

API changes

Data model changes