As of February 2017, the Wii has 1,531 games (so google says). FAT32 and NTFS support allows to have more than 500 games (that from what I read was a WBFS partition limit). If using FAT32 or NTFS, USB Loader GX should support more than just 500 games.
I would like this in the real Wii, although doing for the Wii and the vWii should be the same :)