User blog comment:MisterWoodhouse/Profile and Message Wall on the Unified Community Platform/@comment-38126337-20200306210255/@comment-20644-20200306235036

We won't be able to add a source mode button to the Wall because the technology was not built for MediaWiki integration. Whether or not that was to ever happen is not within the scope of launching the UCP.

We'll have an announcement on the updates being made to Discussions in the near-future.

We don't have any announcements about blogs yet since we're still evaluating the future of that feature. Because of that, it hasn't been added to the UCP at this point so, at the very least, it won't be available on new wikis once they're created on the UCP. Once we have a decision on blogs, we'll communicate it here.