I know it's not nintendo's fault that they didn't know about yellows8 exploit, but now because of their move, 5.4.0, 5.5.0 are enjoying themselves.To be fair, Nintendo can only patch what they -know- to be exploited. It was a pre-emptive patch that they had to do blindly because they didn't have the actual exploit to examine. There's no fault in them trying, and now there are 2 less entrypoints for them to worry about.
Nin released 5.5.1, which lead to yellows8's fool and then now we can enjoy his exploit.