At work I run close to 30 VM's on Ubuntu. I chose Ubuntu for two reasons. I've been running it on my desktop for years and thus know how it works. And CentOS di

At work I run close to 30 VM's on Ubuntu. I chose Ubuntu for two reasons. I've been running it on my desktop for years and thus know how it works. And CentOS did not have the newer versions of various packages I needed in its default repos. For the couple years I've been doing this, I can't think of any downtime that wasn't caused by something other than the OS. Heck, even my desktop hasn't had OS caused downtime. I would bet my experience would be the same if I was using CentOS. Also, there are so many different ways you can automate your server and app deployments, that your choice of OS should really depend on what app you are running. A cutting edge app might need the latest Ubuntu release to get the latest packages. Another app might need the stability of an LTS release. And another might only work with an RPM based OS and specific versions of dependencies that are only found on CentOS. Anyway, that's my opinion and experience. I am curious if there's statistical/scientific evidence supporting the idea that CentOS/RHEL is more stable than Debian/Ubuntu.