* Move too quickly
* Too much to learn to quickly, each version has serious breakage from the
previous.
* I have to cary lots of custom packages, and rebuilding all of those for
each new release is a pain.
* Wrong runtimes. Moving to Ruby 2.0 really quickly and dropping previous
Rubies, etc.
* Lots of commercial/third party applications are not available on Fedora.
(The stuff you'd run on the servers in bigger companies often times).
In general, I love Fedora. I use it as kind of the what's next look ahead.
But living in a server world, EL is what I need for stability.