You still have to invoice/bill customers and do the books.
Actually, no. That's all done automatically.
You're right about the rest -- but so far "bugs in my code" is very correlated to "new features in my code", so if I get hit by a bus it's unlikely that many new bugs will be found.
Well, but your hosting is probably paid for by an account owned by you or your business, and if you go away, those accounts do too, Amazon pulls the plug, Tarsnap go bye-bye.
Actually, no. That's all done automatically.
You're right about the rest -- but so far "bugs in my code" is very correlated to "new features in my code", so if I get hit by a bus it's unlikely that many new bugs will be found.