It all depends. If you: 1. Need features on the bleeding edge AND 2. Are capable of fixing or working around any problems that come up AND 3. Are willing to

It all depends. If you: 1. Need features on the bleeding edge AND 2. Are capable of fixing or working around any problems that come up AND 3. Are willing to do so in terms of time and effort AND 4. Have made a good business case that the benefits are worth the costs and risks then, sure, go ahead, use Fedora on your servers. Same as anything else: make a carefully considered decision.