Im pretty sure nintendo knows about homebrew,knows about smea and yellows8,knows about luma and knows about all the exploits.
Otherwise the sudden updates that remove exploits would be purely coincidental,as for removing all the DSIware titles(what if someone is snitching on us,the homebrew community and getting paid for it?

meh i dont really think so...

)
I think that theyll use something entirely different so that people dont use the same methods,i mean,it sounds like the thing they would do...

with all that said,merry tempmas!