Nintendo seems to be doing baby steps. Instead of waiting until they fully secure it, they just release each bit separately. They don't really add any new features either. Just improve the security.
Might take a while to make a method of decrypting a package, I assume they need to do so for CFW. The existing way doesn't work anymore.
You'd think with all the money TX gets, they'd have a way to run CFW on patched units. And they wouldn't need to borrow anything from the open source community.
SX OS wouldn't exist, if somebody else didn't do most of the work. They just want money, not to actually do anything themselves. They do have XCI loading, but that's kind of useless. Once free CFW has EmuNAND, there won't be any reason to use SX OS.