I think this isn't a migration. They simply shut down a bunch of old forums (including this one) and start with a new one. Copy over some stuff and delete everything else.Been there, done that, got the T-Shirt. 3-4 hours, no fancy gimmicks used (basic tools only), all alone and more than once. Coffee breaks included.
Do I get a cookie now?
Professionals? Guys who earn their money with it? Live Migration.
Either way, 72hrs isn't shiny. Very, very far from it.