Go on
Apparently its a thing, but I don't know how to what needs to be done, so I can't comment in its utility as a platform. But from reading the
libreto libretro website, it works on more platforms than Sine Mora does.
TBH, I haven't figured all the ins and outs, so I have to direct you to google.
It still suffers from the gamepads are expensive when you buy 4 of them problem. Hopefully you can set up a workshop at the next Pinball Jam and show how its done.
The problems with Xbox are:
Interfacing controls requires hacking up gamepads or buying Kades. Kades get expensive when you buy four of them, but I've been to that website 20 times and still can't figure out what exactly I need to order.
You need a kade and the xbox to usb cable. Use a rope or string to measure how much you need to connect wherever you are mounting the xbox. Get a Xbox to usb cable for each kade. Get the "2ft" length and buy a 3ft USB extender cable from amazon or order the custom length.