This month's MCC Development Update provides updates on future Halo Insider flights, answers to community questions, and recaps Reach's presence at @HaloOutpost. Learn more: https://t.co/ycv1gHtYfH pic.twitter.com/XWdrqhOVJl— Halo (@Halo) August 1, 2019
As has been stated previously, making any game is hard, let alone where you’re dealing with 11 game engines and 7 complete games under the roof of one title sharing the same hardware resources.
One key goal that has been a part of bringing Halo: Reach into MCC is that for Xbox One, the team has been attempting to bring UE4 online for new character customization options on Xbox. You can read more about the progression system in the May and June development updates. This however has proved to be quite challenging as MCC was already close to memory limits running on the original Xbox One consoles. Bringing the entire progression and customization system into MCC also requires memory to be used to run the additional UE4 engine. Currently, a lot of progress has been made in getting it up and running, but the title still is not within memory constraints to properly run on the Xbox One. In order to flight on Xbox One, we need to be within these limits, otherwise instability will be an issue.
Until the team has an adequate solve for this unique issue, flighting on the Xbox One will continue to be delayed. That being said, the team is pushing hard on a solution as they want to flight the Xbox One build as soon as possible. Until then though flighting will continue to remain solely on the PC build.