Both the DS & Wii are notorious for being very easy to hack into due to their lack of protection, making them extremely popular among Modders, hackers, Cheaters & Pirates.
Which is why when the 3DS & WII U came out, Nintendo massively went & improved on the security aspect, by having actual protection. with updates & bricking the system if you do hack it. that is also why
Mario Kart 7 & 8 doesn't have as many problems when it comes to online in general. Because of Nintendo's stronger grip in online. (Though this could change as the Wii U is ending production soon, & hackers had already found a way to hack both it & the 3DS.)
im considering jailbreaking my old 3ds when the updates cease, not necesarily to hack online games though. it opens up some possibities for the console. also, why cant custom themes be a standard feature, having to pay two dollars for a premade one or having to do digital surgery to make it possible is a slap in the face. but i digress.
edit: oh, and mod support would be nice, especially since microsoft did it with the Xbox one.
edit: oh, and mod support would be nice, especially since microsoft did it with the Xbox one.