To be honest I'm still on very old tech anyway with the G6 Lite, but in all honesty, what can this new card do that mine can't?! If there's some omfgwtfawesome new additions that make it a worthy purchase I may be tempted but I can't see anything that great.
I think i can see your point of view: you have a flash card that runs yours backups just fine and you don't use it for anything else, so why bother buying a new one?
I congratulate you for being happy with what you have.
That said, the list of features this card has and G6 Lite don't are obvious:
-Don't have to patch roms
-Higher transfer speed from pc to flash card
-You don't need to use a special loader to connect to pc, so if it's broken you can buy a new one in any computer store
-There is no need of patcher programs, so linux and mac users don't have to use emulators
-You don't have to use a passcard or have had your DS flashed
- It's OPEN SOURCE
-... And others features you maybe o maybe not care about.
As I have said, I hope you continue using your G6 Lite and being as happy as you are right now, but for those who wants to buy a flash card, this card is a winner (if the promises become reality)
P.D. Sorry about my english, but I think it's undestable enough