The upgrade is taking longer than I thought based on it being the weekend. So, I decided to keep the forum open BUT keep in mind that you might see posts you make in the next day or so DISAPPEAR (or the risk of disappearing) because of the data transfer not catching it timing wise. I will try and re-load the forum fully as a separate entity to make sure these get re-captured but there is no guarantee.
So, don't think a mod removed your posts in the next day or two. 
Thanks everyone!