Multi-system administration with Func

You have to have quite large scale of requirements to decide to deploy 
and use such a system. And you would not replace it with ease. There are 
several already designed systems, like cfengine, bcfg2, automateit, 
puppet (whihc is used by func), etc. But usually you pick such a system 
only once and then cope with its limitations for a long time before you 
decide to try something next.