GBA roms sorted by size
Not quite true. Certainly there are none any larger. But while there's only a few GBA games up against the limit worth playing, there were several GBC games that wound up pushing against the limits. Probably because it was pushing the same technology for too long -- space was getting cheaper and developers were coming up with more ways to use it. And there's already a few that hit the limit on the DS! But I doubt we'll see the revival of MBC tech. With a 4Gb cart, there's no problems to worry about whether the image fits after you subtract space for the bootloader, etc, because as has already been mentioned, DS carts top out at 1Gb.Â
The saver, on the other hand, may be problematic. Hopefully timing won't be important and they can do their idea of virtual EEPROM.