Loading an old FIRM wouldn't do much of anything for us. Ninjhax already works on 9.5 with some simple tweaks anyways. We probably won't ship those tweaks, though, because they might cause compatibility issues with other software. Ninjhax won't be necessary with what we're releasing anyways.Something like that yeah. There was a theory that you could inject an older FIRM*.bin to get access to the patched exploits with new FWs because those aren't console unique like other content is. Then use Cubic or OoT to launch gateway's launcher and DG to 4.x, upgrade back to 9.2. (Won't work on N3DS/2DS obviously) I'd test it out but I'm one of those people that won't even bother modding my 3DS until I brick it because I'm a lazy manchild. I also have zero clue as to if that would even work, seems it might but I'm waaay tired so I'm not really a reliable sauce of info atm.
Also on the note of re-enabling the MSET exploit, it's not really that insane. We'd just reboot into a non-emunand FIRM with AM checks patched and install it over the newer one.