But ... will we need this when actual homebrew channel drops ?
I never saw any homebrew that needed THE USER to have this kinda of info
The installation of the A9HL exploit on 3DS involves (or involved until very recently on N3DS) a downgrade to OFW 2.0 to be able to dump the OTP, needed to install the hack itself back in OFW 9.2.
For the time being, this ELF only prints the keys on screen. It doesn't create a file just yet. But you'll probably need it to install a permanent CFW à la 3DS.