[@mercime]

First pass at diagramming bbPress Theme Compat. Have not included info at https://codex.bbpress.org/themes/theme-compatibility/template-hierarchy-in-detail/ – haven’t read the source code for it nor played with those yet.

SVG embedded in HTML – use Ctrl/Cmd + to zoom in and Ctrl/Cmd - to zoom out. Right click + drag right/left as needed after zooming in.

The arrows showing template partials pointing to the other partials pointing to the main template file/s could be confusing for many. Possibly, itemizing each main template file in association to the partials would be clearer e.g.

/theme-folder
     |__ archive-forum.php
              |__ /bbPress folder 
                        |__ content-archive-forum.php
                                   |__ form-search.php
                                   |__ loop-forums.php
                                   |__ feedback-no-forums.php