Thanks for clarifying.
I already knew about the three points you mentioned, but I wont update my 3DS unless it's an actual new update (I'll Google it 1st).
1. Well yeah. But it's not like I'll end up on frankenfirmware or whatever, right?
2. Hah, I always wondered what this "MINT" title was, thanks.
3. I know, but tbh I want to keep my NNID for now, incase I reinstall eshop in the future.
Another question, if I update it will simply restore it, right?