Who knows really...How much important is the gamecart slot in firmwares lower than 3.0.0 to have the future warmboot exploits ?
I accidentally update the firmware when update to 5.1 without burning fuses.
Surely if one does surface you wouldn't need the physical cart, I launched the browser with Japanese Puyo and SX so I'm assuming Pegaswitch would still work with it for 1.0.0...