Multiple templates in one project

Good day! To create large projects, I would like to be able to add paid templates to the project. For example a forum, marketplace, chat.
I am aware that this can lead to template conflicts. But it is possible, subject to strict rules for adding pages and entities, this will become possible)))) I think this will increase the speed of assembly of new startups and the sellability of templates.


For example, if you accept the following standards:

  1. The template should not work and the essence of User. More precisely, dryness can be used, but essentially new fields cannot be created. (Prevent the creation of fields in the User entities in the template)
  2. All entities and template elements must have a unique ID