The migration was a success!
Of course, there's still a ton of work to do. The site will be "under construction" for a while. But as of now, we have about 90% of the old functionality, in addition to some new features.
Off the top of my head, here are some things that still need to be done. Please be patient - this will take many more weeks to come.
I'm sure there's more. I'll take this on one thing at a time.