The original Halo games aren't available in the form most people want to play them. Only the MCC versions, which has a lot of changes that are not all received well. Including using the shitty original Halo PC port as a base to build from, which was controversial even at the time. Far as I know, the original Halo 2 PC port isn't even playable and barely was even on release and they never ported any others until a decade later. So 3-5 of the biggest reasons to ever own an Xbox right there.
But the real reason is likely because Xbox is pretty good about backwards compatibility across the console generations, so they need to develop an emulator (which has proved quite difficult from my understanding) wasn't as high as others, who quit doing BC back in 7th gen.
The original Halo games aren't available in the form most people want to play them. Only the MCC versions, which has a lot of changes that are not all received well. Including using the shitty original Halo PC port as a base to build from, which was controversial even at the time. Far as I know, the original Halo 2 PC port isn't even playable and barely was even on release and they never ported any others until a decade later. So 3-5 of the biggest reasons to ever own an Xbox right there.
But the real reason is likely because Xbox is pretty good about backwards compatibility across the console generations, so they need to develop an emulator (which has proved quite difficult from my understanding) wasn't as high as others, who quit doing BC back in 7th gen.
Avoiding "Special Editions" is a good reason to emulate old systems.