> and still be left with 16 hours to have a sleep, eat and do some other things. Well there's your problem. You don't need to sit back the whole time while you

> and still be left with 16 hours to have a sleep, eat and do some other things. Well there's your problem. You don't need to sit back the whole time while you're waiting for approval, it's okay to leave your chair. Jokes aside, I think this probably depends on use-case. You can't easily return the computer. And you can't easily buy (and then return) 100 computers if you have a large one-time computation to run.