Nope, because I'd usually notice the writing on the wall ahead of the closure and move - but I also have pretty good backup processes so closing wouldn't usually be the worst thing for me anyway.
I reckon if I had to, I could bring all my personal sites back up from 'hosting gone' to 'fully restored as at 2 days ago' in all cases, and 'last 8 hours of content at most' lost if it's just posts since I don't maintain a complete backup of all attachments to the same standard as I do DB backups.
Though I am expecting a migration in the next year because I find myself less and less happy with what I'm hearing about Linode after the Akamai acquisition, might have to start diversifying things out a bit.