there's not too many reasons to hack the 360 now imo, not with bc on the series x. though, it's not complete bc. it's a solid system for what it is, but that's how I feel about it. mine is only used for testing now. not sure why, but I bought a wifi adapter for it (boy is that cable short). with a phat, you pretty much have to plug it in the front due to how short the cable is. I also bought the perfect length (1.5ft) cable for my usb hdd. everything works, and has worked for like 14 years. knock on wood, but it's never needed to be repaired. beat final fantasy xiii and lords of shadow on it as well as braid a very long time ago. good memories.
btw, speaking of those, the entire final fantasy xiii trilogy is in 4K on the series x. also, at least, lords of shadow 2 is available (not sure about 1) iirc.
speaking of castlevania, both lords of shadow are playable on the series x. they're on sale on the xbox store. the first one is 67% off, and the second is 75% off, so I got both for about $15. the sale ends in a week according to the store. you may have to have xbox gold. neither game seems to be on gamepass.
