Suddenly apps I created but had not updated since the “update” went missing. There’s nothing in the search, just one app I had done the update to. Fortunately, I still had the link to the edit view of it in my browser history. Then It asked if I wanted to perform the migration. Otherwise, that thing is effectively gone to me. There’s no full My stuff or whatever. It still was deployed, but how would I get to the edit view?
Anyway, if anyone comes across this, don’t clear your browser history. OR, I’m a silly luddite who missed the deceptive “all my stuff” link.