@ceralor not to mention literally unlocking the built in GBA backwards compatibility of AGB_FIRM (besides the 10 existing games for solely the ambassador 3DS consoles/accounts) is great, it's very similar to using Nintendont on Wii U to be able to play GameCube games with modern amenities like wireless controllers, virtual memory cards, and more. New Super Ultimate Injector can help immensely in that regard.
The only games that won't work correctly are games that require cartridge hardware (WarioWare Twisted, Boktai games). But you get perfect compatibility with everything else, as it is literally running a GBA in there--as the 3DS shares one of the same CPUs as the DS, which shares one of the same CPUs as the GBA!
@Devourer_ITA @ceralor - We know a lot more than we say, mainly because we don't want to tip off people on how to play our repair system.
When the Wii was still repairable, we knew several ways to check if homebrew was on the system (mostly holding reset on start). If we saw PriiLoader pop up, we knew it had homebrew. But we wouldn't TELL the person on the phone that, because then, they'd know to remove Priiloader before calling to get the system repaired (we refused to repair homebrewed systems and banned the systems). Also - 32004 errors were ALWAYS Homebrew.
As to what we thought of it? Well, that depended on each rep. Personally, I understood WHY Nintendo was so very anti Homebrew...but I knew there were legit reasons to use it. But I worked at NOA, so I had to tow the line when we got those calls
Personally, I don't install Homebrew on my systems until NOA no longer repairs them. I don't want to pirate, I just want a working system. Once NOA stops repairing them, Homebrew allows me to "protect my investment" if my system goes bust.
@ceralor be sure to immediately make CIAs out of any software that requires a copy per console to properly play ;o)
(my Switch will rue the day I find a "switch.hacks.guide")