Calabazam, can you explain how booting off a PC-formatted CF card is convenient?
It's just PC-formatted so that the PC can write to it...
Supporting removable media such as SD cards would be convenient, since it allows transferring files without shutting down the A500.
It's pretty easy to copy files in WinUAE as well, directly to where they should be on your Amiga's Amiga-formatted CF-"harddisk". And that card is already bootable