I'm a little confused what precisely is this? Oot seems to be clear it's decompiled the ROM and can deterministically make a ROM that runs on the hardware and

I'm a little confused what precisely is this? Oot seems to be clear it's decompiled the ROM and can deterministically make a ROM that runs on the hardware and emulator. I thought it was a modern reimplementation but it seems to use parts of a SNES emulator. And seems to run standalone but with parts of SNES hardware there too... Perhaps that made reusing assets easier than converting them. And translating graphics easier to.