John Carmack, the man behind Doom, is a fan of homebrew, and wishes that the DS's platform holders would embrace it rather than hinder it. Carmack believes that homebrew on the DS is perfect for budding programmers, helping them get to grips with game design:
"It is a shame that homebrew development can't be officially sanctioned and supported, because it would be a wonderful platform for a modern generation of programmers to be able to get a real feel for low level design work, to be contrasted with the high level web and application work that so many entry level people start with."
Carmack might be right, and homebrew may have all sorts of wonderful, legal, harmless applications, but he's being somewhat naive. We all know what the main reasons for opening up one's DS is, and that's not something Nintendo likes to encourage, strangely.