I wish there was better communication regarding the technical limitations that prevent certain functionality. Every flashcart seems to have something it doesn't do but the reason behind it isn't always clear. For example, the PSIO requires soldering in a separate switchboard. The MegaSD's Sega CD support doesn't work if a real Sega CD unit is connected. The upcoming Saturn Satiator doesn't include Video CD support. The question that isn't always answered clearly though is if these limits are forced by the quirks of the console's architecture (as in there is no possible workaround at all) or just a limit based on the way this particular device works. That distinction is often left ambiguous.