@exelotl raised up the question of the 'Bootleg Carts' tutorial not really fitting in gbadoc.
IMO this type of content can be moved e.g. to the main gbadev.net webpage, where we already have some kind of more "generic" guides ( https://gbadev.net/getting-started.html ).
However: the guide is very popular, we'd probably break links / force redirections..