I've never actually had Arch break. I've just encountered shit like when I plugged my printer into the USB port of my computer and hit Ctrl+p and realized I didn't have CUPS or any printer spooling stuff installed. So I'd have to stop what I was doing and figure out how to install and configure that stuff. That's part of what makes Arch so enduring to me, but it's also a PITA when you're just trying to get stuff done.