In all Magento 2 courses and tutorials recommended to create vendor and then theme in the
http://devdocs.magento.com/guides/v2.1/frontend-dev-guide/themes/theme-create.html for example.
But luma and blank theme are located in
Should and may we place theme in vendors?
When and why we should do so?
If I place new theme it will not be added to DB. Is there any installation procedure, that differs from creation in