>At Microsoft, those resources are so disconnected from engineering that they seem to rely on whitepapers and customers to learn about their own products.

This is so true. My company was being courted by Azure folks so we got some premium access and it was always laughable and frustrating how much more I knew about their cloud architecture than they did. I remember finally being able to talk to the head of network engineering, who was able to talk me through the finer points of how their load balancers worked (we were bumping up against some limitations). That 5 minute conversation was worth more than all their white papers (which were incorrect and contradictory at times) combined. I think I asked her why they didn't publish this information. She didn't say anything.