DX8 template inheritance
While DX8 utilizes the Drupal 8 core template suggestions (including page, content and field level templates), the terminology is slightly different.
Templates that would have the suggestion: page.html.twig are called "Master templates."
Templates that would have the suggestion: page--content-type.html.twig are the content view mode templates.
Field templates remain unchanged as fields are added to DX8 templates using the twig field variables that Drupal supplies as default. For example:
Note that the layout canvas field renders out as a Drupal field. The content and styling for each layout canvas field on a content entity is stored against the field inside content (so there is a pure separation of content and templates).
There is a new class of templates for components. These are added dynamically inside any master template or content template as needed and can contain Drupal fields and other component fields.