Developer mode has been a thing since 2013, you were able to do this exact thing on XB1. It’s also not really an official feature, it would be like calling those modded ps3 back in the day features. I didn’t even come in here hating, all I said was you can get better version of these old games on pc for free, to which that Xbox employee took offense and threw his tantrum. If you bought a next gen console to play old games from Sony and GameCube, then have fun, do what pleases you