That also wasn’t a launch feature. If I remember correctly, they opened up the FPGA to 3rd party developers and like the same day there were a bunch of console cores already ported over by 3rd parties. On official channels, I think they can safely say they don’t condone the practice. I suspect something similar will happen with the 3D.
If it’s anything like the Analogue Pocket, it has save states built in, so you don’t really need to save anything to the cart.
Analogue Pocket also supports 3rd party emulator cores, so you can very easily play ROMs or even other consoles.
That also wasn’t a launch feature. If I remember correctly, they opened up the FPGA to 3rd party developers and like the same day there were a bunch of console cores already ported over by 3rd parties. On official channels, I think they can safely say they don’t condone the practice. I suspect something similar will happen with the 3D.