I never understood the reason for using a flash card on a 3ds unless you don't own a DS lite or phat, seeing as they can't play any 3DS specific software. I'll keep using my m3 real and my DS lite for DS games and ill be perfectly happy about it.
I own a DSL with a CycloDS (dead team but still good).
I absolutely want to play new Nintendo games (NSMB2, coming Zelda, Mario Kart 7), not even in 3D (poor feature).
So I bought a DSTwo and I found the 3DS XL very cool even for old games (playing Mario Kart on a big screen is cool for me, not for all)..
So...
For this reason I bought a DSiXL and never updated it, old games really look good on it.
The fact that I managed to sudokuhex it within minutes that the exploit was released, it's a big plus, at least I can play some emulators ( like NesDS ) with improved speed directly off the SD card, which makes my DSiXL much more worth then a 3DS or even 3DSXL at this point.
If I'll ever get a 3DS ( and I might do that when a Mario & Luigi game comes out or a new 2D Castlevania or Metroid ) it'll be strictly to play 3DS games, I wouldn't bother for a DS only mode flashcart at all, so this news kind of left me unaffected.