It's so cool all these old systems get a new life through the hands of hackers like him. Otherwise they'd just be landfill junk, thanks to all the copy protection crap that was oh-so-important once upon a time.
I'm rocking my Amiga and C64 with CF and SD cards, and I'm planning to maybe some day buy a SD cart for my NES.
No Pokemon Gos and such nonsense for me, M.U.L.E. from 1983 is plenty enough.
Nights into Dreams still makes me dizzy and confused to this day. Dat pop-up. Kind of a shame that Sega product line up was too over crowded that the Saturn never got it's due, some of the games the came out later in the Saturn's life look really good for their time. Not as good as the n64 but it didn't have the problem where all the walls kind of shake like jello.