I say buy and download all the Xbox 360 backwards compatible games and play them, because currently some games like Splinter Cell Double Agent (whose only stable version is the xbox 360 version as the PC and PS3 version are completely broken; the xbox, ps2, and wii versions are a completely different game), Crackdown 1 and 2, Lost Odyssey, Blue Dragon, Infinite Undiscovery, Final Fantasy XIII (whose best port, I kid you not is to play the 360 version on series x), Fable 2, Gears of war 2 and 3, Rockstar Games Present Table Tennis, and OG 360 version of Nier and Deadly Premonition (that are vastly different in certain aspects comparison to their later ports) are only currently playable on series x. As while with xemu doing gods work, we move very close to a stable OG xbox emulator release, 360 emulation still feels like it is eons away. So buy all the 360 games, and play them on series x with better framerate and performance, and then you can decide whether to keep the console or not.
Or maybe, sell your Series X for a hacked 360, and enjoy your time there as some more exclusives like N3 Ninety Nine Nights, Project Sylpheed, and the MGS + Zone Of Enders HD Collection (which are vastly better than the Mater Collection) are still there. Again, at the end of the day these are just suggestions, it is your purchase, and it is up to you what to decide.