The Halo Master Chief Collection is quite the Master Piece and Will be full cross compatible with Windows 10 platforms that can support it.
I looked in the Windows 10 store and seen that The Halo Master Chief Collection is not available for Purchase for PC.
The Halo Master Chief Collection is very important as its a hub for all Halo Purchases and Belongs on all Window 10 Systems that can Support it.
Having the MCC available to both Xbox and PC is very important it increases the Value of Halo, Microsoft, Xbox, and Windows Store.
Not even Pre-Orders are available yet.
They said Halo MCC will be also a Pc game, not a date, nor other information. I think it is not going to happen in short times, more about years and years and years.
I agree with you: Halo MCC is a masterpiece and should be available also on pc, but, honestly, if 343i is going to do the same bugged game for pc, it is better if they stay concentrate on the xbox one. The same for cross platform: on halo wars 2 it has tons of problems, so it is something that has to be declined.
This is not a support issue. Locking.