It's stable, it has a HUGE software repo (one of the largest ones if I'm not mistaken), third party software and drivers are almost always available as a Debian package, the community behind it is actually serious about making it safe and problem free. So what if some of the software is not bleeding edge? At least I can rest easy when I'm updating my system. I'll almost never have any bad surprises like you get in Arch.

Arch just takes whatever the latest software is and throws it in the repos for the users to figure out if it breaks. Half the solutions you find in the wiki are half-baked solutions just to make things work, but are often not standard or even secure, leaving your system with security holes.