When you need a very stable Distro...

I prefer Opensuse Micro os. Transactional updates > debian

I know I'm gonna make myself unpopular. But Arch Linux never broke on me once. I even survived the grub incident, as I use a different bootloader. You just have to be ok with constant changes, as the software you run won't stay the same for 2 years straight, like it is the case on Debian.