Honestly, carrying around a usb drive is generally a pretty good idea. I carry one with several ISOs so I can rescue a machine if something happens and I am unable to fix it (and also show people what modern Linux has to offer).
This is something I carry pretty much anywhere I take my computer, and would recommend to most people. Sure, I could leave it at home, but if I have to meet a deadline, I don’t want to spend the extra hour driving to my house. It’s a worst case scenario kind of thing, but it pays off considering how little effort takes.
Pretty much DOA due to bad software adaptation and a prohibitive price tag. The marketing department also missed the massive opportunity to market this as a DS emulator (likely due to concern over Nintendo lawsuits).