Wait, I thought you had a live site; you shouldn't be concern with RC1 or any betas.

I pushed mine to 12. I couldn't wait because the studio is just beautiful!

I've made backups and if it gets too bad we have agreed to revert back to the stable version.

Members know this.

I trust this RC release, that doesn't mean others should too. 

I'd think you would be running a test site of yours by now. It's a big change!