Good news, this feature is partially done. :)
Planner tasks can now be copied to other plans. To copy a task, click on the “…” menu on the task. From there, you can select a different plan to copy the task to.
An error occurred while saving the commentDhruvin Shah commented
Seconded. Would be great to make the comments and chats to be written in Nvarchar and also allow Subscript and superscript on it.