Let me explain, to be honest the DSi operating system is really stupid for me, that's because it doesn't have an kernel on it, and the operating system is just an bootcode (maybe an chip like the Nintendo Wii) who launchs the app "Launcher" when you turn it on, and it's really easy to find vulnerabilities on it, like the PIT.BIN exploit and unlaunch's boot code exploit, but the most difficult things is to install apps on the default home menu, i guess here it's not an bullshit anymore.... because to install homebrew apps it's not easy as expected you need Unlaunch's patches or an CFW, but thanks to nocash and @Pk11 is possible install DSi Titles on the DSi Menu (only with unlaucnh patches) that's my opinion on the DSi OS
Nintendo DSi's motherboard
Nintendo DSi's motherboard












