Hi Yak,
I did not really word that very well. Let me clarify. My idea is to opt-in to unstable builds. I totally agree that there is a big risk of pushing unstable builds onto game servers where possible world corruption is possible and I would never suggest that every new build that Red makes be automatically published for mainstream consumption. However, some of us are more development minded and wouldn't mind playing with new features (and aid in bug reporting) in full understanding of the risk. I take my own precautions in game saves. I run my own server and I do not allow automatic updates whatsoever. I keep my saves and config data under version control for safe keeping and allow game updates when I am personally ready to move forward.
If you look at a game like Stranded Deep, you'll see in Steam that an experimental branch is available which has lots of extra features not completely debugged but gives you an idea of how development is going and gives the gamer an opportunity to provide useful feedback to the developer.