For example, after importing around 8.000 categories in physical product, when I clicked on "physical product" to see them, sellacious down (after a long time with) 404 error page.
It seems Sellacious doesn't support unlimited and nested categories. Mijoshop, j2store, or Eshop do the job.
My aim, I would like reproduce something close to indiamart.com with thousands categories. Do you have an idea how to make that with a tons of categories and products?