Hello dbs, I'm so sorry to answer until now, I hadn't noticed that the thread now has 2 pages and your message is on the second page
Yes, that is how my main site's CMS works, it creates a menu and breadcrumb file for each category / subcategory.
These sites are an extension of my main site, so I would like to keep them as close as possible in appearance, so the breadcrumbs is an important element for me. Of course, only showing the categories / subcategories and not the actual page.
Taking into account all the main categories plus the subcategories / sub-subcategories, there would be about 300 breadcrumb / menu files on the Directory site and about 350 on the Geography site.
Regarding the deletion / moving of pages, a "Regenerate menus" and "Regenerate breadcrumbs" URL would suffice.