> What a mess! Why is the DirectX 12 documentation so scattered across so many websites in different shapes and forms? Of course, I don't know
While you're at it, do you also not know why they break the URLs from time to time so that you can't follow old guides because they point to empty pages?
This and also due to the fact that positions that involve writing and managing documentation typically do not have great paths for promotions.
Not just at Microsoft, but it's an entire industry issue. It's not a job most Software companies value, so ambitious people constantly leave for better positions and the jobs constantly get moved around to the cheapest cost center where ownership and knowledge gets lost and quality declines.
Microsoft does this all the time, and it reeks of a lack of continuity or ownership internally.