I know it is silly, but its weird to see this post in the light of Bezos as owner of this publication. He is not exactly neutral on this topic. AWS competes with Azure.
There is a lot to learn about editorial independence in newspapers. While they aren't obliged to announce that kind of influence, I would imagine that a lot of Washington Post writers/editors would speak out if Bezos dictated the content of this post.
The Washington Post is not PandoDaily.