User blog comment:MisterWoodhouse/Profile and Message Wall on the Unified Community Platform/@comment-35628462-20200305182414/@comment-24006128-20200305190926

Again, the solution we chose for rebuilding the feature doesn't support wikitext.

The solution which did support it would hold back upgrading the rest of the platform.

The very small percentage of messages making use of advanced wikitext formatting did not justify holding back the platform upgrade.