@voretaq7 yeah the difference between a MS RC/CTP/DeveloperPreview or beta and freebsd-current is that the beta is long lived, and with the Windows8/Server2012, many MSFT downloads mentioned support for particular pre-RTM releases, while current is a point in time. As far as what is professional, yes don't install the latest freebsd current or windows RC on the important servers. However, depending on the nature of your job/shop DO install it on a dev/test/qa environment and possible your workstation. Try to port your software to the next OS before its released.