I have never felt my 3ds/n3ds heat up ever, except for only slightly if the battery is getting charged. So i highly doubt it.
My N3DS has been in standby for hours with the GW card in, just took it out and its cool to the touch, so nope.
I found out that it heats a bit during standby, not to the point where you have to remove it. Selecting a ROM from the Multi-ROM menu and leaving it there heats it up a tiny bit more. But when playing, it gets very hot.
Sometimes I leave my 3DS on my laptop, on the pefect spot excactly on top of my hard drive and it gets really warm...
Until 2.6 it was not. Also, I still can't find reasoning behind why they allow you to boot into Classic mode without a red card (without all features yes), and they don't outright cockblock you.
You can only enter classic mode without the red card up to FW 7.2 emunand, anything over that will black screen as they don't allow 7.x decryption without inserting the red card (8.x use 7.x encryption on key parts of the FW which is why they don't work)
