XBMC and all the wacky homebrew software extended the life of my original Xbox by more than a decade. I still think the linksbox browser did alphabet input better than any other controller software I've seen. And it was always fun in college to host a Mario Kart 64 night (emulated on Xbox) in the dorms and see the expressions on people's faces when they looked from the controllers to the screen, and then back and forth again. :)
And I still use 2 original Xboxs at LAN parties here and there. Even with a softmod and Linux, it's still possible to system link Halo, Halo 2, Battlefront (2004), Battlefront 2 (2005), Crimson Skies, Metal Arms, and other games across at least three generations of console (Xbox, Xbox 360, Xbox One) with 16-to-32 people. Microsoft does backward compatibility like almost no one else, even on console.
It's getting harder to find replacement controllers, but I've found a local hardware guy in my city who can help find the right replacement parts as little pieces on the board start to fail. I plan on keeping both of mine running as long as possible!