Well that settles it: if they claim to not be an imposter, clearly they can't be an imposter!

It does seem totally bizarre to me to make a big product announcement on a third party's website.

Peak "Shadow IT"? Maybe it took too much effort to post it on the company blog.

(Maybe they maxed out their user account quota on Jira and couldn't post a ticket to get someone to publish their article. Not that anything this silly could happen in a multinational corporation. I'm surely imagining experiencing that.)

Maybe it's their new approach to marketing. To reach people on popular sites in "look, we're using this site too - we're cool and so modern and no different than you ordinary human" way

In case you haven’t figured this out:

Go to https://www.microsoft.com/design

Scroll to the bottom.

Look for the set of social media links; the first one is an “M”.