User blog comment:MisterWoodhouse/The first migrations to the Unified Community Platform/@comment-43288034-20201102155843/@comment-1038387-20201102161927

UCP does not use any of the systems tied to the envelope (old Walls and Forums), so there is no need to have them on UCP.

However, messages received through them on a Legacy wiki don't get converted to the notification bell. You'd have to preiodically check a Legacvy wiki, like Central is at the moment.

It's annoying, but temporarily programming that in during the transition period is probably not an efficient use of resources.