My title may be incorrect, but I hope I get the idea across...
You know, when you have a failed startup and Grub decides next time it starts up it'll disable the countdown and give you indefinite time to choose your OS? I dont want that.
I have a computer that needs to run 24/7, and has a failsafe that'll restart the computer under some circumstances. This weekend, while I was out of town, I had the computer restart twice-- interrupting the first boot! This disabled the countdown, so the computer sat there in the Grub screen all weekend- which wasn't good, for me.